Charles Harmon, M.D.
NPI 1659666923 · Anatomic Pathology & Clinical Pathology Physician · Helena, MT
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Harmon, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Helena, MT (NPI 1659666923).
Provider details
- NPI number
- 1659666923
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MED-PHYS-LIC-51841 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
3,040 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 1,594 | $33 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 417 | $25 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 187 | $31 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 130 | $70 |
| Microscopic Genetic Analysis of Tumor, Manual88360 | 88 | $35 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 77 | $10 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-15
- Last updated
- 2022-07-21
Frequently asked questions
- What is Charles Harmon's NPI number?
- Charles Harmon's National Provider Identifier (NPI) is 1659666923, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Harmon's specialty?
- Charles Harmon is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Harmon located?
- Charles Harmon's practice location on file with NPPES is 2475 E Broadway St, Helena, MT 59601-4928.
- What is Charles Harmon's phone number?
- The practice phone number listed in the NPPES registry for Charles Harmon is (406) 447-2427.
- Does Charles Harmon accept Medicare?
- Charles Harmon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Harmon's NPI active?
- Yes — Charles Harmon's NPI (1659666923) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.