Nathaniel G. Clark, MD
Endocrinology, Diabetes & Metabolism Physician · Hyannis, MA
Nathaniel G. Clark, MD is an endocrinology, diabetes & metabolism physician with a practice address in Hyannis, Massachusetts, and NPI 1386687234, issued on Jun 14, 2006. Check the license (Massachusetts 72154, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Nathaniel G. Clark
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 72154 MA
Self-reported in NPPES; status is on the state search - Practice location
- 433 W Main St, Hyannis, MA 02601
- Phone
- (508) 778-4777
- Enumerated
- Jun 14, 2006
- Record last updated
- Sep 27, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (508) 771-9555
- Medicare enrollment
- Enrolled (PECOS I20100627000014); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 433 W Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Miriam Cerutti, D.O.Internal Medicine Physician1609077437
- Arthur Crago, MDInternal Medicine Physician1851340475
- Elizabeth Dunton, NPNurse Practitioner1033323217
- Amy Gardner, M.D.Internal Medicine Physician1598846529
Verify Nathaniel G. Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 72154Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
127 Medicare Part D claims for 38 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium63 claims
- Alendronate Sodium30 claims
- Synthroid14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $163.22
5 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Medical Affiliates OF Cape Cod IncHyannis, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathaniel G. Clark among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
Nathaniel G. Clark, MD is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 52% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1988 · median 2002 among the 378 with a school on file
- Record last updated2012 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Hyannis → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Mary Crowell, MDHyannis, MA 026011003854365
- Doriann Klaassen, MDHyannis, MA 026011043721632
- Catalina Norman, MD, PHDHyannis, MA 026011831374107
- Wingyee Wan, MDHyannis, MA 026011922468164
- Ziad Farah, MDHarwich, MA 026451700854619
- Zona Batacchi, M.D.Harwich Port, MA 026461629352869
- John Coughlin, MDFalmouth, MA 025401275583932
- Jennifer Patten, M.D.South Yarmouth, MA 026641891720546
Common questions
What is Nathaniel G. Clark, MD's NPI number?
Nathaniel G. Clark, MD's National Provider Identifier (NPI) is 1386687234, issued on Jun 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel G. Clark, MD located?
The NPPES record lists a practice address at 433 W Main St, Hyannis, MA, 02601. Phone: (508) 778-4777. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel G. Clark, MD's license?
NPPES lists Massachusetts license number 72154, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathaniel G. Clark, MD prescribe under Medicare Part D?
In 2024, Nathaniel G. Clark, MD had 127 Medicare Part D claims for 38 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.