Mason James Walgrave, M.D.
Hospitalist Physician · Charleston, SC
Mason James Walgrave, M.D. is a hospitalist physician with a practice address in Charleston, South Carolina, and NPI 1144670662, issued on Jun 15, 2016. Check the license (South Carolina 39795, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mason James Walgrave
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 39795 SC
Self-reported in NPPES; status is on the state search - Practice location
- 169 Ashley Ave, Charleston, SC 29425
- Phone
- (843) 792-0435
- Enumerated
- Jun 15, 2016
- Record last updated
- Oct 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20200630000207); accepts Medicare assignment
- Medical or professional school
- University Of North Texas Hsc, College Of Osteopathic Med, 2016
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 470 in South Carolina → Look up another NPI →
Also registered at 169 Ashley Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yusuf Aboutabl, MDAnesthesiology Physician1164358107
- Claire Adcock, MDDiagnostic Radiology Physician1194352021
- George Adly, MDInternal Medicine Physician1942824115
- Ahmad Aleisa, MDInternal Medicine Physician1043735095
- Biff Alexander, MDPsychiatry Physician1619893641
- Margaret Allen, MDPediatrics Physician1598505026
Verify Mason James Walgrave in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 39795Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average hospitalist physician in 2024
42 Medicare Part D claims for 18 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of 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
- University Medical Associates OF The Medical University OF South CarolCharleston, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mason James Walgrave among 470 hospitalist physician records in South Carolina
Mason James Walgrave, M.D. is one of 470 hospitalist physician records with a practice address in South Carolina. 93% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 66% of them.
- NPI issued2016 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 93% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2016 · median 2011 among the 409 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in South Carolina
There are 470 hospitalist physician records in South Carolina.
All 470 in South Carolina → Every provider in Charleston → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- David Bundy, MDCharleston, SC 294251528150356
- Patrick Cawley, MDCharleston, SC 294251992813943
- Theresa Cuoco, MDCharleston, SC 294251124046677
- Robert Harrington, MDCharleston, SC 294251518919380
- Michael Hawkins, M.D.Charleston, SC 294251821091224
- Thomas Kyle, M.D.Charleston, SC 294251750355921
- Sarah Mennito, M.D.Charleston, SC 294251811085863
- David Mills, MDCharleston, SC 294251235228008
Common questions
What is Mason James Walgrave, M.D.'s NPI number?
Mason James Walgrave, M.D.'s National Provider Identifier (NPI) is 1144670662, issued on Jun 15, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mason James Walgrave, M.D. located?
The NPPES record lists a practice address at 169 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-0435. Providers update this record themselves, so call before visiting.
How can I verify Mason James Walgrave, M.D.'s license?
NPPES lists South Carolina license number 39795, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mason James Walgrave, M.D. prescribe under Medicare Part D?
In 2024, Mason James Walgrave, M.D. had 42 Medicare Part D claims for 18 beneficiaries; the average among hospitalist physician prescribers was 521. 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.