Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Susan A Larson, M.D.
Pediatrics Physician in Boulder, CO · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336125632
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Registry record
Entity type Individual (Type 1)
Name Dr. Susan A Larson
Credential M.D.
Sex Female
Practice address 4745 Arapahoe Ave Ste 200, Boulder, CO, 80303
Phone (303) 938-4750
Fax (303) 938-4753
Enumeration date Dec 19, 2005
Last updated in NPPES Mar 22, 2021
Taxonomy & licenses
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 |
|---|---|---|---|
| 88455050 | Medicaid | CO | - |
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.
Frequently asked questions
What specialty is Susan Larson?
Susan Larson is registered in NPPES with the primary taxonomy of Pediatrics 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.
Other providers at this practice address
Browse all → Lauren Brave Pediatrics Physician · Boulder, CO NPI 1285603696 Kathryn Hoch Obstetrics & Gynecology Physician · Boulder, CO NPI 1639268642 Andrea Burgess Obstetrics & Gynecology Physician · Boulder, CO NPI 1972638294 Erin Harper-Sanchez Family Nurse Practitioner · Boulder, CO NPI 1629293436 Kimberly Lerner Endocrinology, Diabetes & Metabolism Physician · Boulder, CO NPI 1225254782 Katherine Kennedy Pediatrics Physician · Boulder, CO NPI 1376743856 Angela Paddack Otolaryngology Physician · Boulder, CO NPI 1871767954 James Gottlieb Pediatrics Physician · Boulder, CO NPI 1811213838
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-22.