David M. Harlan, M.D.
Endocrinology, Diabetes & Metabolism Physician · Worcester, MA
David M. Harlan, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Worcester, Massachusetts, and NPI 1083737951, issued on Apr 7, 2007. Check the license (Massachusetts 242351, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- David M. Harlan
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 242351 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lake Ave N, Worcester, MA 01655
- Phone
- (508) 334-3206
- Enumerated
- Apr 7, 2007
- Record last updated
- Oct 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (508) 856-3811
- Medicaid ID
- 110084080A MA
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 55 Lake Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David M. Harlan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 242351Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
165 Medicare Part D claims for 30 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 61% of claims.
Most prescribed
- Jardiance33 claims
- Atorvastatin Calcium18 claims
- Ezetimibe11 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.
The MIPS final score for 2023 (Medicare payment program): 97 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
David M. Harlan among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
David M. Harlan, M.D. 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 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 40% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2020 · 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 Worcester → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Neil Aronin, M.D.Worcester, MA 016551679556252
- Seth Arum, M.D.Worcester, MA 016551679578793
- Daniel Baran, M.D.Worcester, MA 016551841260221
- Raffaella Colzani, M.D.Worcester, MA 016551356324297
- Taniya De Silva, M.D.Worcester, MA 016551740212273
- Leslie Domalik, MDWorcester, MA 016551841307261
- Richard Haas, M.D.Worcester, MA 016551023017373
- Samir Malkani, M.D.Worcester, MA 016551174506018
Common questions
What is David M. Harlan, M.D.'s NPI number?
David M. Harlan, M.D.'s National Provider Identifier (NPI) is 1083737951, issued on Apr 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is David M. Harlan, M.D. located?
The NPPES record lists a practice address at 55 Lake Ave N, Worcester, MA, 01655. Phone: (508) 334-3206. Providers update this record themselves, so call before visiting.
How can I verify David M. Harlan, M.D.'s license?
NPPES lists Massachusetts license number 242351, 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 David M. Harlan, M.D. prescribe under Medicare Part D?
In 2024, David M. Harlan, M.D. had 165 Medicare Part D claims for 30 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is David M. Harlan, M.D.'s MIPS final score?
The 2023 MIPS final score is 97 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.