Ross J. Vanantwerp, D.O., M.P.H.
Internal Medicine Physician · Annapolis, MD
Ross J. Vanantwerp, D.O., M.P.H. is an internal medicine physician with a practice address in Annapolis, Maryland, and NPI 1790924512, issued on Feb 18, 2009. Check the license (Maryland H0033830, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Ross J. Vanantwerp
- Credential
- D.O., M.P.H.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- H0033830 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1 Park Place Ste 325, Annapolis, MD 21401
- Phone
- (410) 995-8550
- Enumerated
- Feb 18, 2009
- Record last updated
- Oct 23, 2024
- Fax
- (410) 514-3582
- Medicare enrollment
- Enrolled (PECOS I20090415000557); may accept Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Verify Ross J. Vanantwerp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H0033830Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
134 Medicare Part D claims for 17 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Rosuvastatin Calcium27 claims
- Levothyroxine Sodium22 claims
- Mounjaro18 claims
- Liothyronine Sodium11 claims
- Metformin Hcl Er11 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.
Industry payments in 2024: $23.84
1 payment: food and beverage; the largest payer was Solta Medical, a division of Bausch Health US, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Ross J. Vanantwerp among 3,904 internal medicine physician records in Maryland
Ross J. Vanantwerp, D.O., M.P.H. is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 36% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1983 · median 2003 among the 2,445 with a school on file
- Record last updated2024 · 59% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
100 internal medicine physician records list a practice address in Annapolis
They are 100 of the 3,629 NPPES records with a practice address in Annapolis, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Annapolis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Titus Abraham, MDAnnapolis, MD 214011598764540
- Donna Chambers, MDAnnapolis, MD 214011528067642
- Aditya Chopra, MDAnnapolis, MD 214011508850991
- Michael Freedman, M.D.Annapolis, MD 214011528045606
- Joseph Friend, MDAnnapolis, MD 214011144207028
- Howard Goldstein, MDAnnapolis, MD 214011174500060
- Brian Harvey, MDAnnapolis, MD 214011285636217
- Okeowo Ibitoye, MDAnnapolis, MD 214011154322352
Common questions
What is Ross J. Vanantwerp, D.O., M.P.H.'s NPI number?
Ross J. Vanantwerp, D.O., M.P.H.'s National Provider Identifier (NPI) is 1790924512, issued on Feb 18, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Ross J. Vanantwerp, D.O., M.P.H. located?
The NPPES record lists a practice address at 1 Park Place Ste 325, Annapolis, MD, 21401. Phone: (410) 995-8550. Providers update this record themselves, so call before visiting.
How can I verify Ross J. Vanantwerp, D.O., M.P.H.'s license?
NPPES lists Maryland license number H0033830, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ross J. Vanantwerp, D.O., M.P.H. prescribe under Medicare Part D?
In 2024, Ross J. Vanantwerp, D.O., M.P.H. had 134 Medicare Part D claims for 17 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.