NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John P Mamana, M.D.

Internal Medicine Physician in Reston, VA · enumerated 2005.

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

National Provider Identifier

1487654554

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Registry record

Entity type Individual (Type 1)
Name Dr. John P Mamana
Credential M.D.
Sex Male
Practice address 12040 S Lakes Dr, Suite 205, Reston, VA, 20191
Phone (703) 230-6990
Fax (703) 230-6990
Enumeration date Jul 29, 2005
Last updated in NPPES Mar 25, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0101021602 (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
224013 Other VA TRIGON KEYAD
257642 Other VA MDIPA/OPTIMUM CHOICE/MAMS
5820308 Medicaid VA -
461832 Other VA AETNA/US HEALTHCARE
505114 Other VA NCPPO
45560004 Other VA BCBS DC CAPCARE
5325453-022 Other VA CIGNA HMO
0400438 Other VA UNITED HEALTH VIRGINIA
4092013 Other VA AHP MGD CHOICE
541908735 Other VA PREFERRED PLAN
224013 Other VA ANTHEM HEALTHKEEPERS
110184237 Other VA RAILROAD MEDICARE
723576 Other VA AFFORDABLE FIRST HEALTH
0403501 Other VA UNITED HEALTH MID-ATLANTI
541908735 Other VA CCN
541908735 Other VA PHCS
360386 Other VA ONE HEALTH GREATWEST
541908735 Other VA CHAMPUS/TRICARE/STANDARD

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.

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Frequently asked questions

What specialty is John Mamana?
John Mamana is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-25.