Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William C. Kramer, M.D.

Orthopaedic Surgery Physician in Boulder, CO · enumerated 2008 · practices at Bouldercentre for Orthopedics.

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

National Provider Identifier

1093978223

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Registry record

Entity type Individual (Type 1)

Name William C. Kramer

Credential M.D.

Sex Male

Practice address Boulder, CO, 80301

Phone (303) 449-2730

Fax (303) 449-5821

Enumeration date Jul 8, 2008

Last updated in NPPES Feb 26, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License DR0053611 (CO) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 94-06920 (KS) Secondary

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

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

Is NPI 1093978223 active?

Yes, as of the latest NPPES snapshot, NPI 1093978223 is active (record last updated 2026-02-26).

How do I verify William Kramer's NPI record?

Cross-check NPI 1093978223 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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Ingrid Ching Physical Therapist · Boulder, CO NPI 1295733186 Khemarin Seng Orthopaedic Surgery Physician · Boulder, CO NPI 1740261676 Steven Faust Physical Therapist · Boulder, CO NPI 1558344838 David Conyers Specialist · Boulder, CO NPI 1780648378 Lorri Fulkerson Orthopaedic Surgery Physician · Boulder, CO NPI 1417905811 James Rector Orthopaedic Surgery Physician · Boulder, CO NPI 1124076591 Stephen Paul Orthopaedic Surgery Physician · Boulder, CO NPI 1114976354 Lynn Voss Orthopaedic Surgery Physician · Boulder, CO NPI 1295784437

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-26.