Diana R. Kerwin, MD
Geriatric Medicine (Internal Medicine) Physician · Dallas, TX
Diana R. Kerwin, MD is a geriatric medicine (internal medicine) physician with a practice address in Dallas, Texas, and NPI 1750335097, issued on May 20, 2006. Check the license (Texas P5658, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Diana R. Kerwin
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License numbers
- P5658 TX
44447 WI
Self-reported in NPPES; status is on the state search - Practice location
- 8198 Walnut Hill LN Ste 100, Dallas, TX 75231
- Phone
- (214) 345-4449
- Enumerated
- May 20, 2006
- Record last updated
- Jan 13, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (214) 345-1238
- Medicaid IDs
- 34205300 WI
326041601 TX - Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 256 in Texas → Look up another NPI →
Also registered at 8198 Walnut Hill LN Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amitabh Gupta, M.D. PH.D.Neurology Physician1174660278
- Mary Lively, NP-CFamily Nurse Practitioner1114261401
- Jennifer Vo, MSN, RN, ACNP-BCAcute Care Nurse Practitioner1396162780
Verify Diana R. Kerwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license P5658Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
28 Medicare Part D claims, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D.
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: $17,062.42
18 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 1,004 providers of this specialty with any payment received $1,720.82 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.
Diana R. Kerwin among 256 geriatric medicine (internal medicine) physician records in Texas
Diana R. Kerwin, MD is one of 256 geriatric medicine (internal medicine) physician records with a practice address in Texas. 71% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 44% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 56% of these records are
- Record last updated2016 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Texas
There are 256 geriatric medicine (internal medicine) physician records in Texas.
All 256 in Texas → Every provider in Dallas → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Jennifer AdamsDallas, TX 752311902546054
- Neerja Bhardwaj, MD, MPHDallas, TX 752311194837716
- Mark Fleschler, M.D.Dallas, TX 752311083652986
- David Crawford, MDDallas, TX 752351003490434
- Robert Haddox, MDDallas, TX 752351770518896
- Harold Wagner, D.O.Dallas, TX 752371114015138
- Soroush Behnam, MDDallas, TX 752431710908744
- Anita Aisner, M.D.Dallas, TX 752441891900460
Common questions
What is Diana R. Kerwin, MD's NPI number?
Diana R. Kerwin, MD's National Provider Identifier (NPI) is 1750335097, issued on May 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Diana R. Kerwin, MD located?
The NPPES record lists a practice address at 8198 Walnut Hill LN Ste 100, Dallas, TX, 75231. Phone: (214) 345-4449. Providers update this record themselves, so call before visiting.
How can I verify Diana R. Kerwin, MD's license?
NPPES lists Texas license number P5658, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diana R. Kerwin, MD prescribe under Medicare Part D?
In 2024, Diana R. Kerwin, MD had 28 Medicare Part D claims; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.