Robert Watha, M.D.
Internal Medicine Physician · Saginaw, MI
Robert Watha, M.D. is an internal medicine physician with a practice address in Saginaw, Michigan, and NPI 1356735286, issued on Mar 28, 2015. Check the license (Michigan 4301107178, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Robert Watha
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301107178 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1447 N Harrison St, Saginaw, MI 48602
- Phone
- (989) 583-4220
- Enumerated
- Mar 28, 2015
- Record last updated
- Mar 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (989) 583-4287
- Medicare enrollment
- Enrolled (PECOS I20180707000143); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1447 N Harrison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Watha in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301107178Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
625 Medicare Part D claims for 267 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Cefuroxime44 claims
- Pantoprazole Sodium40 claims
- Prednisone29 claims
- Amoxicillin-Clavulanate Potass22 claims
- Amlodipine Besylate21 claims
- Atorvastatin 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 one group practice
- Covenant Medical Center IncSaginaw, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Watha among 5,735 internal medicine physician records in Michigan
Robert Watha, M.D. is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 66% of them.
- NPI issued2015 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2014 · median 2006 among the 3,564 with a school on file
- Record last updated2021 · 54% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
169 internal medicine physician records list a practice address in Saginaw
They are 169 of the 6,008 NPPES records with a practice address in Saginaw, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Saginaw → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anna Bartnik, M.D.Saginaw, MI 486021750492864
- Rebecca Baumbach, M.D.Saginaw, MI 486021487674214
- Jon Begos, D.OSaginaw, MI 486021689617003
- Glenn Cipullo, M.DSaginaw, MI 486021174570428
- Manisha Gupta, M.D.Saginaw, MI 486021336250505
- William Hampton, MDSaginaw, MI 486021689683997
- Shireen Haque, M.D.Saginaw, MI 486021760593891
- Minoo Khetarpal, M.D.Saginaw, MI 486021033197942
Common questions
What is Robert Watha, M.D.'s NPI number?
Robert Watha, M.D.'s National Provider Identifier (NPI) is 1356735286, issued on Mar 28, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Robert Watha, M.D. located?
The NPPES record lists a practice address at 1447 N Harrison St, Saginaw, MI, 48602. Phone: (989) 583-4220. Providers update this record themselves, so call before visiting.
How can I verify Robert Watha, M.D.'s license?
NPPES lists Michigan license number 4301107178, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Watha, M.D. prescribe under Medicare Part D?
In 2024, Robert Watha, M.D. had 625 Medicare Part D claims for 267 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.