Michael Nmn Grassia, MD
Nephrology Physician · Norfolk, VA
Michael Nmn Grassia, MD is a nephrology physician with a practice address in Norfolk, Virginia, and NPI 1235128133, issued on Oct 14, 2005. Check the license (Virginia 0101232951, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Michael Nmn Grassia
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 0101232951 VA
Self-reported in NPPES; status is on the state search - Practice location
- 6160 Kempsville Circle, Norfolk, VA 23502
- Phone
- (757) 466-9288
- Enumerated
- Oct 14, 2005
- Record last updated
- Oct 25, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (757) 457-3691
- Medicaid ID
- 005875072 VA
- Medicare enrollment
- Enrolled (PECOS I20101013000505); accepts Medicare assignment
- Medical or professional school
- Eastern Virginia Medical School, 1997
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 327 in Virginia → Look up another NPI →
Also registered at 6160 Kempsville Circle
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frank Gwathmey, M.D.Orthopaedic Hand Surgery Physician1366406316
- Christy SoreyFamily Nurse Practitioner1891427357
Verify Michael Nmn Grassia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101232951Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average nephrology physician in 2024
631 Medicare Part D claims for 113 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Losartan Potassium77 claims
- Lisinopril47 claims
- Furosemide45 claims
- Calcitriol44 claims
- Amlodipine Besylate41 claims
- Tamsulosin Hcl34 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 67.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $348.38
8 payments; by number, the most common kind was food and beverage; the largest payer was Calliditas Therapeutics US Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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.
Bills Medicare through one group practice
- Nephrology Associates OF Tidewater LtdNorfolk, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Nmn Grassia among 327 nephrology physician records in Virginia
Michael Nmn Grassia, MD is one of 327 nephrology physician records with a practice address in Virginia. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1997 · median 2001 among the 242 with a school on file
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Virginia
There are 327 nephrology physician records in Virginia.
All 327 in Virginia → Every provider in Norfolk → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Abdul Chaudhry, M.D.Norfolk, VA 235021396742037
- Sandeep Magoon, MDNorfolk, VA 235021962698720
- Melody Siff, MDNorfolk, VA 235021205330750
- Wei Zhao, M.D.Norfolk, VA 235021205834405
- Anthony Zydlewski, MDNorfolk, VA 235021720077431
- Thomas McCune, MDNorfolk, VA 235071154310050
- Maxim Mirovski, MDNorfolk, VA 235071689797847
- Mruna Patel, MDNorfolk, VA 235071003445040
Common questions
What is Michael Nmn Grassia, MD's NPI number?
Michael Nmn Grassia, MD's National Provider Identifier (NPI) is 1235128133, issued on Oct 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael Nmn Grassia, MD located?
The NPPES record lists a practice address at 6160 Kempsville Circle, Norfolk, VA, 23502. Phone: (757) 466-9288. Providers update this record themselves, so call before visiting.
How can I verify Michael Nmn Grassia, MD's license?
NPPES lists Virginia license number 0101232951, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Nmn Grassia, MD prescribe under Medicare Part D?
In 2024, Michael Nmn Grassia, MD had 631 Medicare Part D claims for 113 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Michael Nmn Grassia, MD's MIPS final score?
The 2023 MIPS final score is 67.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.