Dr. Heidi Petra Bas , MD
Anesthesiology โข Boston, MA
55 Fruit Street Cln 309, Anesthesia Associates
Boston, MA 021142696
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 July 4, 2006; this date does not establish years in practice.
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Published CMS data list 283 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:
- 36620 โ Insertion of artery tube for blood sampling or infusion through skin: 40 service units.
- 00537 โ Anesthesia for procedure to assess heart electrical activity: 32 service units.
- 76937 โ Ultrasonic guidance for blood vessel access: 30 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 12 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 12 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:
- Sumatriptan Succinate โ 12 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 the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 80% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: 118. Middle half: 53 to 224.
More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: 136. Middle half: 66 to 248.
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 144 in 2020 to 283 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
55 Fruit Street Cln 309
Anesthesia Associates
Boston, MA 021142696
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in New Bedford, MA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 2 distinct group names: Massachusetts General Physicians Organization Inc; Southcoast Physicians Group 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
1994
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
257 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 $47,964 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 $38,144 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
12 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
$32 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
Years since graduation
32 years (graduated 1994)
CMS Doctors and Clinicians data list 1994 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
2006
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)
Dr. Bas 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 Dr. Bas 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 80% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: 118. Middle half: 53 to 224.
More Medicare Part B services than 75% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: 136. Middle half: 66 to 248.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: $15,862. Middle half: $7,477 to $33,650.
A higher Medicare-allowed amount than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: $16,429. Middle half: $8,286 to $31,402.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Anesthesiology in Boston, MA (2024, 528 clinicians with data). Median for this group: $12,488. Middle half: $5,940 to $26,601.
A higher Medicare payment amount than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: $13,131. Middle half: $6,643 to $24,992.
Medicare Part D prescriptions
Fewer Part D prescriptions than 90% of clinicians listed under Anesthesiology in Boston, MA (2024, 39 clinicians with data). Median for this group: 168. Middle half: 39 to 303.
Fewer Part D prescriptions than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 90 clinicians with data). Median for this group: 110. Middle half: 26 to 331.
Part D drug cost
A lower Part D drug cost than 95% of clinicians listed under Anesthesiology in Boston, MA (2024, 39 clinicians with data). Median for this group: $2,472. Middle half: $795 to $9,386.
A lower Part D drug cost than 95% of clinicians listed under Anesthesiology in Massachusetts (2024, 90 clinicians with data). Median for this group: $2,252. Middle half: $254 to $11,783.
1,083 active clinicians are listed under Anesthesiology with a practice address in Boston, MA (2,090 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
1.8% of these 1,083 clinicians have the CMS telehealth indicator.
69.2% of these 1,083 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 97% from 144 in 2020 to 283 in 2024.
- 2020: 144
- 2021: 151
- 2022: 285
- 2023: 229
- 2024: 283
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Medicare-allowed amount
Medicare-allowed amount increased 551% from $7,373 in 2020 to $47,964 in 2024.
- 2020: $7,373
- 2021: $10,762
- 2022: $28,211
- 2023: $29,044
- 2024: $47,964
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Paid by Medicare
Paid by Medicare increased 565% from $5,733 in 2020 to $38,144 in 2024.
- 2020: $5,733
- 2021: $8,607
- 2022: $21,848
- 2023: $23,120
- 2024: $38,144
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2023 to 12 in 2024.
- 2023: 11
- 2024: 12
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30-day fills
30-day fills went from 11 in 2023 to 12 in 2024.
- 2023: 11
- 2024: 12
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Part D drug cost
Part D drug cost went from $34 in 2023 to $32 in 2024.
- 2023: $34
- 2024: $32
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 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, 2017โ2024; 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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36620
Insertion of artery tube for blood sampling or infusion through skin
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40 | 39 | $166.10 | $43.17 |
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00537
Anesthesia for procedure to assess heart electrical activity
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32 | 32 | $2963.31 | $239.59 |
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76937
Ultrasonic guidance for blood vessel access
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30 | 25 | $46.60 | $13.53 |
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01922
Anesthesia for x-ray or radiation therapy
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26 | 26 | $1299.19 | $107.60 |
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00560
Anesthesia for procedure on heart and large blood vessels
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24 | 24 | $3264.63 | $516.98 |
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00811
Anesthesia for other procedure on large bowel using an endoscope
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23 | 23 | $787.91 | $66.88 |
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93503
Insertion of tube in pulmonary artery for monitoring
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23 | 23 | $337.70 | $84.96 |
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00731
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope
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22 | 22 | $827.86 | $70.17 |
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00567
Anesthesia for heart artery bypass grafting on heart-lung machine
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17 | 17 | $5774.59 | $897.11 |
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93312
Ultrasound of heart with probe in esophagus, with report
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17 | 17 | $348.82 | $103.47 |
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93325
Ultrasound of heart with color-depicted blood flow, rate and valve function
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16 | 16 | $10.00 | $3.01 |
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00410
Anesthesia for procedure to correct abnormal heart rhythm
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13 | 13 | $687.00 | $66.52 |
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 |
|---|---|---|---|---|---|
| Sumatriptan Succinate | Sumatriptan Succinate | 12 | 360 | $31.58 | 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
Self-certified to NPPES: 2024-11-12NUCC Taxonomy Code: 207L00000X
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ANESTHESIOLOGY
I20050713000610
MA
8527094358
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
Massachusetts General Physicians Organization Inc
55 Fruit St, Boston, MA 021142696
Phone: 6177240287
Southcoast Physicians Group Inc
101 Page St, New Bedford, MA 027403464
Phone: 5089735919
Secondary Practice Locations
101 Page St
New Bedford, MA 027403464
Phone: 5089735425
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Anesthesiology - Pain Medicine
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Anesthesiology
MDPHD
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated July 04, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Anesthesiology Specialists in Boston
- Dr. Maria Borrelli, DO
- Dr. Satya-Krishna Ramachandran, MD
- Dr. Syed M. Khurram Owais, MD
- Dr. Ntesi Asimi, MD
- Dr. Raimis Matulionis, MD
- Dr. Ping Jin, MD
Mailing Address
Po Box 9142, Mass General Physician Organization
Charlestown, MA 021299142
Phone: 6177240287