Thomas Chalmers, MD
Thomas Chalmers is a Anesthesiology Physician provider (Anesthesiology) practicing in Boulder, CO, registered in the NPPES registry with NPI 1407807423 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1407807423 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Thomas Chalmers |
| Credential | MD |
| Sex | Male |
| Practice address | Boulder, CO, 80304 |
| Phone | 3034402273 |
| Enumeration date | 2006-05-15 |
| Last updated in NPPES | 2015-03-16 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207L00000X | Anesthesiology Physician | Primary | 29095 | CO |
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 |
|---|---|---|---|
| 050077651 | Medicaid | CO | — |
Copy-ready billing details
Provider: Thomas Chalmers, MD NPI: 1407807423 Taxonomy: 207L00000X (Anesthesiology Physician) Address: Boulder, CO, 80304
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1942293485 | Jie Mao | Individual | Diagnostic Radiology Physician | Boulder, CO |
| 1295728780 | Robert Helgans | Individual | Diagnostic Radiology Physician | Boulder, CO |
| 1538152038 | Christopher Nusser | Individual | Diagnostic Radiology Physician | Boulder, CO |
| 1669465001 | Richard Finer | Individual | Diagnostic Radiology Physician | Boulder, CO |
| 1538150966 | David Benner | Individual | Physician Assistant | Boulder, CO |
| 1659354637 | Boulder Emergency Physicians PC | Organization | Emergency Medicine Physician | Boulder, CO |
| 1275516726 | John Carter | Individual | Emergency Medicine Physician | Boulder, CO |
| 1043295306 | Martha Cabeen | Individual | Emergency Medicine Physician | Boulder, CO |
Verify this record
Cross-check NPI 1407807423 against the authoritative CMS record: view Thomas Chalmers on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2015-03-16.