Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Merritt, M.D.

Internal Medicine Physician in Richmond, VA · enumerated 2006 · practices at Harold T Green Jr MD PC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1821027822

Verified

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Registry record

Entity type Individual (Type 1)

Name Karen Merritt

Credential M.D.

Sex Female

Practice address 2421 Chamberlayne Ave, Richmond, VA, 23222

Phone (804) 329-8510

Enumeration date Jul 2, 2006

Last updated in NPPES Dec 11, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D43375 (MD) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0101281453 (VA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
52843505	Other	MD	CAREFIRST
193371000	Other	MD	MEDICAL ASSISTANCE
P00756085	Other	GA	RAILROAD MEDICARE
255824	Other	-	KAISER PERMANENTE
E402-0023	Other	DC	CAREFIRST
159359ZDVX	Other	MD	MEDICARE
226802	Other	-	JHH

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Karen Merritt?

The National Provider Identifier (NPI) for Karen Merritt is 1821027822, a Type 1 (individual) record in the CMS NPPES registry.

Where does Karen Merritt practice?

The practice location on file with NPPES is in Richmond, VA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Harold Green Internal Medicine Physician · Richmond, VA NPI 1427169044 Harold T Green Jr MD PC Legal Medicine · Richmond, VA NPI 1255460887 Dawn Walker Family Medicine Physician · Richmond, VA NPI 1053525600 Jeannie Mason-Walker Family Nurse Practitioner · Richmond, VA NPI 1861023046 April Beach Family Nurse Practitioner · Richmond, VA NPI 1679254833

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-11.