Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Christopher Greaser, MD

Orthopaedic Foot and Ankle Surgery Physician in Bellaire, TX · enumerated 2008.

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

National Provider Identifier

1811156979

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Registry record

Entity type Individual (Type 1)

Name Michael Christopher Greaser

Credential MD

Sex Male

Practice address 5420 West Loop S Ste 2400, Bellaire, TX, 77401

Phone (134) 863-5507

Enumeration date Jun 4, 2008

Last updated in NPPES Jul 16, 2022

Taxonomy & licenses

207XX0004X Orthopaedic Foot and Ankle Surgery Physician Allopathic & Osteopathic Physicians · License N9708 (TX) 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
NC1792	Medicaid	SC	-
5922842	Medicaid	NC	-

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

Is NPI 1811156979 active?

Yes, as of the latest NPPES snapshot, NPI 1811156979 is active (record last updated 2022-07-16).

How do I verify Michael Greaser's NPI record?

Cross-check NPI 1811156979 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-16.