Gregory Baker
Internal Medicine โข Boston, MA
801 Massachusetts Ave, Crosstown 2
Boston, MA 021182605
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on April 2, 2015; this date does not establish years in practice.
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Published CMS data list 3,882 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 93306 โ Ultrasound of heart with color-depicted blood flow, rate, direction and valve function: 709 service units.
- 93010 โ Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only: 653 service units.
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 541 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 26 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 677 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Metoprolol Succinate โ 112 prescription fills, including refills.
- Eliquis (Apixaban) โ 80 prescription fills, including refills.
- Atorvastatin Calcium โ 74 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 18 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Boston, MA (2024, 1,138 clinicians with data). Median for this group: 230. Middle half: 108 to 528.
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: 524. Middle half: 200 to 1,073.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 193 in 2018 to 3,882 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2018โ2024.
Practice Location & Contact Primary Location
801 Massachusetts Ave
Crosstown 2
Boston, MA 021182605
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 2 distinct group names: Cardiology Physicians, Llc; Christiana Care Health Services Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2015
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
2,350 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $385,546 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $293,993 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
1,569 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$143,819 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $40.34 across 2 records.
By nature of payment
- Food and Beverage: $40.34 across 2 records.
Reporting-company totals
- Kestra Medical Technology Services, Inc.: $24.52 across 1 record.
- Siemens Medical Solutions USA, Inc.: $15.82 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
11 years (graduated 2015)
CMS Doctors and Clinicians data list 2015 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2015
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Gregory Baker has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Gregory Baker as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Boston, MA (2024, 1,138 clinicians with data). Median for this group: 230. Middle half: 108 to 528.
More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: 524. Middle half: 200 to 1,073.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Boston, MA (2024, 1,138 clinicians with data). Median for this group: $23,760. Middle half: $10,686 to $49,412.
A higher Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: $50,126. Middle half: $19,685 to $96,485.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Internal Medicine in Boston, MA (2024, 1,138 clinicians with data). Median for this group: $18,125. Middle half: $8,159 to $37,798.
A higher Medicare payment amount than 95% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: $38,152. Middle half: $14,838 to $74,912.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Internal Medicine in Boston, MA (2024, 1,038 clinicians with data). Median for this group: 341. Middle half: 68 to 1,461.
Close to the middle for clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: 1,174. Middle half: 129 to 3,740.
Part D drug cost
A higher Part D drug cost than 65% of clinicians listed under Internal Medicine in Boston, MA (2024, 1,038 clinicians with data). Median for this group: $55,608. Middle half: $2,852 to $214,435.
Close to the middle for clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: $103,819. Middle half: $9,088 to $319,703.
2,320 active clinicians are listed under Internal Medicine with a practice address in Boston, MA (6,830 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
25.4% of these 2,320 clinicians have the CMS telehealth indicator.
55.3% of these 2,320 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 1911% from 193 in 2018 to 3,882 in 2024.
- 2018: 193
- 2019: 63
- 2023: 751
- 2024: 3,882
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Medicare-allowed amount
Medicare-allowed amount increased 1799% from $20,300 in 2018 to $385,546 in 2024.
- 2018: $20,300
- 2019: $12,079
- 2023: $90,797
- 2024: $385,546
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Paid by Medicare
Paid by Medicare increased 1718% from $16,174 in 2018 to $293,993 in 2024.
- 2018: $16,174
- 2019: $8,334
- 2023: $71,743
- 2024: $293,993
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 289% from 174 in 2018 to 677 in 2024.
- 2018: 174
- 2021: 66
- 2022: 30
- 2023: 70
- 2024: 677
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30-day fills
30-day fills increased 558% from 238 in 2018 to 1,569 in 2024.
- 2018: 238
- 2021: 96
- 2022: 73
- 2023: 182
- 2024: 1,569
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Part D drug cost
Part D drug cost increased 800% from $15,977 in 2018 to $143,819 in 2024.
- 2018: $15,977
- 2021: $581
- 2022: $377
- 2023: $22,745
- 2024: $143,819
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 99% from $2,723.51 in 2022 to $40.34 in 2025.
- 2022: $2,723.51
- 2023: $3,095.22
- 2024: $20.59
- 2025: $40.34
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $40.34.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Kestra Medical Technology Services, Inc. |
Food and Beverage
Cash or cash equivalent
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Assure WCD | General | $24.52 |
| Siemens Medical Solutions USA, Inc. |
Food and Beverage
In-kind items and services
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ACUSON Origin Diagnostic Ultrasound System | General | $15.82 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2018โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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93306
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
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709 | 705 | $683.00 | $186.03 |
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93010
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
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653 | 572 | $88.39 | $7.88 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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541 | 369 | $161.00 | $76.04 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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362 | 286 | $62.00 | $13.89 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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319 | 219 | $228.00 | $125.45 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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170 | 163 | $300.00 | $125.83 |
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93306
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
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165 | 165 | $1632.27 | $66.38 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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143 | 143 | $353.00 | $161.94 |
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99152
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes
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106 | 103 | $33.03 | $11.75 |
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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78 | 76 | $438.00 | $166.45 |
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93325
Ultrasound of heart with color-depicted blood flow, rate and valve function
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65 | 63 | $400.81 | $2.96 |
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92960
External shock to heart to regulate heart beat
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64 | 62 | $400.00 | $104.07 |
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99490
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
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63 | 18 | $94.00 | $61.55 |
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93321
Ultrasound of heart blood flow, valves and chambers, follow-up
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61 | 60 | $181.24 | $6.90 |
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93458
Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist
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58 | 58 | $778.00 | $236.50 |
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93312
Ultrasound of heart with probe in esophagus, with report
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50 | 49 | $661.97 | $102.19 |
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93228
Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional
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48 | 48 | $64.00 | $24.22 |
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93229
Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional
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48 | 48 | $1943.00 | $791.81 |
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93042
Electrocardiogram (ecg) 1 to 3 leads with review by physician only
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43 | 41 | $19.00 | $6.38 |
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93224
Electrocardiogram (ecg) 2-day continuous with review and report by health care professional
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34 | 34 | $272.00 | $67.29 |
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93268
Electrocardiogram (ecg) up to 30 days continuous with symptom monitoring and review and report by health care professional
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24 | 24 | $638.00 | $164.76 |
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93308
Ultrasound of heart, follow-up
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21 | 21 | $619.66 | $23.99 |
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92928
Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch
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18 | 18 | $1469.05 | $558.76 |
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93456
Insertion of tube in right heart chambers and coronary artery for diagnosis with review by radiologist
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15 | 15 | $817.00 | $295.76 |
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93571
Ultrasound evaluation of heart blood vessel during diagnosis or treatment, initial vessel
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13 | 13 | $238.00 | $68.31 |
(top 25 shown)
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Metoprolol Succinate | Metoprolol Succinate | 112 | 7,555 | $1,307.81 | 43 |
| Eliquis | Apixaban | 80 | 5,483 | $106,210.40 | 24 |
| Atorvastatin Calcium | Atorvastatin Calcium | 74 | 5,855 | $1,521.53 | 27 |
| Carvedilol | Carvedilol | 68 | 4,920 | $778.87 | 22 |
| Furosemide | Furosemide | 42 | 2,700 | $267.48 | 20 |
| Amlodipine Besylate | Amlodipine Besylate | 38 | 2,838 | $396.07 | 14 |
| Clopidogrel | Clopidogrel Bisulfate | 33 | 2,550 | $806.98 | 14 |
| Hydrochlorothiazide | Hydrochlorothiazide | 31 | 2,310 | $235.39 | 13 |
| Lisinopril | Lisinopril | 29 | 2,250 | $245.67 | โ |
| Losartan Potassium | Losartan Potassium | 25 | 1,230 | $79.31 | โ |
| Metoprolol Tartrate | Metoprolol Tartrate | 23 | 1,815 | $127.96 | โ |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 22 | 1,380 | $429.87 | โ |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 21 | 1,530 | $214.70 | โ |
| Valsartan | Valsartan | 21 | 1,290 | $1,422.14 | โ |
| Entresto | Sacubitril/Valsartan | 17 | 750 | $15,314.76 | โ |
| Amiodarone Hcl | Amiodarone Hcl | 15 | 890 | $245.36 | โ |
| Xarelto | Rivaroxaban | 14 | 780 | $14,101.00 | โ |
| Hydralazine Hcl | Hydralazine Hcl | 12 | 900 | $114.06 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - CARDIOVASCULAR DISEASE (CARDIOLOGY)
I20230910000072
DE
3971810029
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Cardiology Physicians, Llc
1050 Industrial Dr, Middletown, DE 197092801
Phone: 3023668600
Cardiology Physicians, Llc
1 Centurian Dr, Newark, DE 197132150
Phone: 3023668600
Cardiology Physicians, Llc
910 Foulk Rd, Wilmington, DE 198033158
Phone: 3023668600
Cardiology Physicians, Llc
4755 Ogletown Stanton Rd, Newark, DE 197182200
Phone: 3027331000
Christiana Care Health Services Inc
4755 Ogletown Stanton Rd, Newark, DE 197182200
Phone: 3028383088
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Internal Medicine
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 801 MASSACHUSETTS AVE, CROSSTOWN 2, BOSTON, MA 021182605 (Tel: 6174147399)
Registered at 720 HARRISON AVE, DOB 503, BOSTON, MA 021182371
Internal Medicine (license number reported to NPPES: MA 274252)
NPI status registered as active in NPPES database
Registered at 725 ALBANY ST, SHAPIRO 5 & 6, BOSTON, MA 021182526 (Tel: 6174145951)
Registered at 77 WORTENDYKE AVE, EMERSON, NJ 076301740
Recorded as GREGORY BAKER
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Boston
- Dr. Dimple Chhatlani, DO
- Dr. Jack Varon, MD, MBA
- Dr. Brian Powers, MD
- Dr. Michael Mansour, MD, PhD
- Dr. Samantha Karle, MD
- Dr. Kripesh Subedi, MD
Mailing Address
720 Harrison Ave, Dob 503
Boston, MA 021182371