Nancy C. Haff, MD
Internal Medicine Physician · Wellesley, MA
Nancy C. Haff, MD is an internal medicine physician with a practice address in Wellesley, Massachusetts, and NPI 1922411867, issued on Jun 9, 2014. Check the license (Massachusetts 269993, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Nancy C. Haff
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 269993 MA
Self-reported in NPPES; status is on the state search - Practice location
- 70 Hastings St Ste 200, Wellesley, MA 02481
- Phone
- (781) 772-8600
- Enumerated
- Jun 9, 2014
- Record last updated
- Jan 9, 2026
- Fax
- (781) 772-5600
- Medicare enrollment
- Enrolled (PECOS I20170607001773); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 70 Hastings St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julie Coffey, NPAdult Health Nurse Practitioner1023249190
- Daniel Gaposchkin, M.D/PH.D.Internal Medicine Physician1821194879
Verify Nancy C. Haff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 269993Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,313 Medicare Part D claims for 131 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium123 claims
- Omeprazole87 claims
- Amlodipine Besylate63 claims
- Levothyroxine Sodium62 claims
- Irbesartan45 claims
- Metoprolol Succinate43 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.
Bills Medicare through one group practice
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy C. Haff among 6,825 internal medicine physician records in Massachusetts
Nancy C. Haff, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 72% of them.
- NPI issued2014 · 72% of these records are older, 26% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2014 · median 2004 among the 4,103 with a school on file
- Record last updated2026 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
81 internal medicine physician records list a practice address in Wellesley
They are 81 of the 1,117 NPPES records with a practice address in Wellesley, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Wellesley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mitchell Abramson, M.D.Wellesley Hills, MA 024811417952284
- Dea Angiolillo, M.D.Wellesley, MA 024811649241985
- Mary Barker, M.D.Wellesley, MA 024811215908132
- Peter Britton, M.D.Wellesley, MA 024811184695082
- Mary Brogan, M.D.Wellesley, MA 024811912987454
- Carol Burd, M.D.Wellesley, MA 024811114998036
- Nancy Corliss, MDWellesley, MA 024811699763482
- Steven Flier, M.D.Wellesley, MA 024811013905751
Common questions
What is Nancy C. Haff, MD's NPI number?
Nancy C. Haff, MD's National Provider Identifier (NPI) is 1922411867, issued on Jun 9, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Nancy C. Haff, MD located?
The NPPES record lists a practice address at 70 Hastings St Ste 200, Wellesley, MA, 02481. Phone: (781) 772-8600. Providers update this record themselves, so call before visiting.
How can I verify Nancy C. Haff, MD's license?
NPPES lists Massachusetts license number 269993, 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 Nancy C. Haff, MD prescribe under Medicare Part D?
In 2024, Nancy C. Haff, MD had 1,313 Medicare Part D claims for 131 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.