Daniel Ritz Witt, MD
Internal Medicine Physician · Wellesley, MA
Daniel Ritz Witt, MD is an internal medicine physician with a practice address in Wellesley, Massachusetts, and NPI 1710513510, issued on Mar 12, 2020. Check the license (Massachusetts 1017832, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Daniel Ritz Witt
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 1017832 MA
Self-reported in NPPES; status is on the state search - Practice location
- 62 Walnut St Ste 2, Wellesley, MA 02481
- Phone
- (857) 678-3901
- Enumerated
- Mar 12, 2020
- Record last updated
- Jun 30, 2026
- Fax
- (857) 314-6445
- Medicare enrollment
- Enrolled (PECOS I20240608000048); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Daniel Ritz Witt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1017832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
511 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. 19 claims were for opioids.
Most prescribed
- Metoprolol Succinate29 claims
- Atorvastatin Calcium24 claims
- Tamsulosin Hcl22 claims
- Eliquis19 claims
- Losartan Potassium19 claims
- Rosuvastatin Calcium17 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 2 group practices
- Associated Physicians OF Harvard Medical Faculty Physicians AT Beth ISMilton, MA
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncMilton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Ritz Witt among 6,825 internal medicine physician records in Massachusetts
Daniel Ritz Witt, 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 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 11% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · 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 Daniel Ritz Witt, MD's NPI number?
Daniel Ritz Witt, MD's National Provider Identifier (NPI) is 1710513510, issued on Mar 12, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Ritz Witt, MD located?
The NPPES record lists a practice address at 62 Walnut St Ste 2, Wellesley, MA, 02481. Phone: (857) 678-3901. Providers update this record themselves, so call before visiting.
How can I verify Daniel Ritz Witt, MD's license?
NPPES lists Massachusetts license number 1017832, 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 Daniel Ritz Witt, MD prescribe under Medicare Part D?
In 2024, Daniel Ritz Witt, MD had 511 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.