Dr. William B Holgerson , MD
Internal Medicine • Wellesley, MA
40 Walnut Street, Suite 201
Wellesley, MA 024812102
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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Dr. William Holgerson is listed in NPPES under Internal Medicine.
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NPI assigned on September 12, 2006; this date does not establish years in practice.
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Published CMS data list 2,632 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- G2211 — Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's: 520 service units.
- 99214 — Established patient outpatient office visit: 347 service units.
- 36415 — Insertion of needle into vein for collection of blood sample: 329 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 · Guide: How to read Medicare Part B data
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Published CMS data list 4,732 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 643 prescription fills, including refills.
- Metoprolol Succinate — 236 prescription fills, including refills.
- Hydrochlorothiazide — 226 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 90 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Wellesley, MA (2024, 58 clinicians with data). Median for this group: 959. Middle half: 460 to 1,605.
More Medicare Part B services than 90% 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 – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,577 in 2020 to 2,632 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
40 Walnut Street
Suite 201
Wellesley, MA 024812102
CMS Doctors and Clinicians lists 1 group name: Newton Wellesley Primary Care P C. 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
University Of Massachusetts Medical School
1975
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
342 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 – by Provider, 2024.
Medicare-allowed amount
About $167,840 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 – by Provider and Service, 2024.
Paid by Medicare
About $132,681 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 – by Provider and Service, 2024.
30-day fills
11,335 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
$321,315 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $109.37 across 5 records.
By nature of payment
- Food and Beverage: $109.37 across 5 records.
Reporting-company totals
- Pfizer Inc.: $55.79 across 3 records.
- Eli Lilly and Company: $29.73 across 1 record.
- Exact Sciences Corporation: $23.85 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
51 years (graduated 1975)
CMS Doctors and Clinicians data list 1975 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, “Does your provider accept Medicare as full payment?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Can order Medicare-covered services
CMS lists Dr. Holgerson as eligible to order or refer durable medical equipment (DME) 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 Wellesley and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Wellesley, MA (2024, 58 clinicians with data). Median for this group: 959. Middle half: 460 to 1,605.
More Medicare Part B services than 90% 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 Wellesley, MA (2024, 58 clinicians with data). Median for this group: $65,838. Middle half: $39,958 to $114,757.
A higher Medicare-allowed amount than 90% 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 Wellesley, MA (2024, 58 clinicians with data). Median for this group: $51,060. Middle half: $30,942 to $90,267.
A higher Medicare payment amount than 90% 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
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Wellesley, MA (2024, 61 clinicians with data). Median for this group: 1,985. Middle half: 840 to 3,636.
More Part D prescriptions than 80% of 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 85% of clinicians listed under Internal Medicine in Wellesley, MA (2024, 61 clinicians with data). Median for this group: $142,063. Middle half: $51,316 to $225,150.
A higher Part D drug cost than 75% of 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.
81 active clinicians are listed under Internal Medicine with a practice address in Wellesley, MA (6,830 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Wellesley
55.6% of these 81 clinicians have the CMS telehealth indicator.
66.7% of these 81 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 67% from 1,577 in 2020 to 2,632 in 2024.
- 2020: 1,577
- 2021: 1,772
- 2022: 1,736
- 2023: 1,707
- 2024: 2,632
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Medicare-allowed amount
Medicare-allowed amount increased 43% from $117,038 in 2020 to $167,840 in 2024.
- 2020: $117,038
- 2021: $154,451
- 2022: $150,111
- 2023: $146,156
- 2024: $167,840
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Paid by Medicare
Paid by Medicare increased 43% from $92,909 in 2020 to $132,681 in 2024.
- 2020: $92,909
- 2021: $122,845
- 2022: $121,637
- 2023: $119,244
- 2024: $132,681
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 23% from 3,842 in 2020 to 4,732 in 2024.
- 2020: 3,842
- 2021: 3,743
- 2022: 3,896
- 2023: 4,330
- 2024: 4,732
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30-day fills
30-day fills increased 28% from 8,852 in 2020 to 11,335 in 2024.
- 2020: 8,852
- 2021: 9,068
- 2022: 9,506
- 2023: 10,450
- 2024: 11,335
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Part D drug cost
Part D drug cost increased 64% from $195,820 in 2020 to $321,315 in 2024.
- 2020: $195,820
- 2021: $192,096
- 2022: $270,060
- 2023: $303,795
- 2024: $321,315
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $38.06 in 2021 to $109.37 in 2025.
- 2021: $38.06
- 2023: $56.46
- 2024: $73.84
- 2025: $109.37
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 · 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 – December 31, 2025): fewer than 11 records totaling $109.37.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
MOUNJARO | General | $29.73 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $23.85 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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ELIQUIS | General | $19.79 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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ELIQUIS | General | $19.19 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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ELIQUIS | General | $16.81 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
|
520 | 282 | $18.00 | $17.34 |
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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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347 | 233 | $396.09 | $139.49 |
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36415
Insertion of needle into vein for collection of blood sample
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329 | 253 | $21.00 | $8.65 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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285 | 179 | $279.72 | $99.43 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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276 | 276 | $310.00 | $141.23 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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243 | 236 | $75.00 | $15.79 |
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G0008
Administration of influenza virus vaccine
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166 | 166 | $91.95 | $35.30 |
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90662
Influenza vaccine split virus, preservative free
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165 | 165 | $165.90 | $81.58 |
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82270
Stool analysis for blood to screen for colon tumors
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126 | 126 | $25.00 | $4.29 |
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96132
Evaluation of neuropsychological test, first hour
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83 | 83 | $180.00 | $136.73 |
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96138
Administration of psychological or neuropsychological test by technician, first 30 minutes
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81 | 81 | $50.00 | $40.15 |
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G0402
Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
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11 | 11 | $450.00 | $178.03 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 643 | 51,956 | $8,293.14 | 169 |
| Metoprolol Succinate | Metoprolol Succinate | 236 | 20,000 | $6,733.32 | 67 |
| Hydrochlorothiazide | Hydrochlorothiazide | 226 | 19,391 | $492.60 | 63 |
| Lisinopril | Lisinopril | 224 | 17,472 | $974.74 | 58 |
| Lorazepam | Lorazepam | 168 | 4,891 | $1,214.85 | 45 |
| Simvastatin | Simvastatin | 164 | 13,980 | $974.70 | 42 |
| Amlodipine Besylate | Amlodipine Besylate | 156 | 13,872 | $1,087.04 | 49 |
| Losartan Potassium | Losartan Potassium | 156 | 14,017 | $2,141.92 | 48 |
| Levothyroxine Sodium | Levothyroxine Sodium | 155 | 12,509 | $1,314.51 | 40 |
| Omeprazole | Omeprazole | 129 | 9,980 | $1,428.68 | 35 |
| Metformin Hcl | Metformin Hcl | 113 | 10,170 | $469.92 | 32 |
| Tamsulosin Hcl | Tamsulosin Hcl | 110 | 8,883 | $2,138.13 | 30 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 99 | 8,649 | $2,893.38 | 32 |
| Atenolol | Atenolol | 97 | 8,650 | $835.69 | 28 |
| Eliquis | Apixaban | 88 | 4,978 | $93,885.27 | 21 |
| Zolpidem Tartrate | Zolpidem Tartrate | 81 | 2,012 | $330.22 | 20 |
| Gabapentin | Gabapentin | 80 | 5,240 | $1,116.63 | 31 |
| Escitalopram Oxalate | Escitalopram Oxalate | 78 | 6,259 | $846.63 | 24 |
| Ozempic | Semaglutide | 67 | 2,252 | $72,648.61 | 12 |
| Allopurinol | Allopurinol | 63 | 5,670 | $779.52 | 19 |
| Donepezil Hcl | Donepezil Hcl | 51 | 3,120 | $583.07 | 11 |
| Clonazepam | Clonazepam | 50 | 2,785 | $267.11 | 12 |
| Trazodone Hcl | Trazodone Hcl | 50 | 3,825 | $775.98 | 20 |
| Azithromycin | Azithromycin | 44 | 395 | $137.62 | 34 |
| Furosemide | Furosemide | 43 | 3,573 | $264.78 | 12 |
(top 25 shown)
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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: 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
Newton Wellesley Primary Care P C
40 Walnut St, Wellesley, MA 024812102
Phone: 7812351224
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
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated September 12, 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 Internal Medicine Providers in Wellesley
- Dr. Nancy Corliss, MD
- Nicole Larue
- Dr. Aida Martinez, MD
- Dr. Peter Britton, MD
- Dr. Carol Burd, MD
- Dr. Eve Sobel, MD
Mailing Address
40 Walnut Street, Suite 201
Wellesley, MA 024812102
Phone: 7812351224