Charles Hardin, M.D.,PH.D
NPI 1336173087 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Hardin, M.D.,PH.D is a Internal Medicine Physician provider in Boston, MA (NPI 1336173087).
Provider details
- NPI number
- 1336173087
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.,PH.D
- Sex
- Male
- Sole proprietor
- No
- License
- 229347 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
1,255 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) |
|---|---|---|
| Test to Measure Rate of Airflow94375 | 360 | $15 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 309 | $9 |
| Test to Determine Lung Volumes Using Sensors94726 | 115 | $12 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 103 | $11 |
| Test for Exercise-Induced Heart and Lung Stress94621 | 98 | $70 |
| Test to Determine Lung Volumes Using Gas Dilution Or Washout94727 | 73 | $12 |
| Critical Care, First 30-74 Minutes |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2010-06-02
Frequently asked questions
- What is Charles Hardin's NPI number?
- Charles Hardin's National Provider Identifier (NPI) is 1336173087, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Hardin's specialty?
- Charles Hardin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Hardin located?
- Charles Hardin's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Charles Hardin's phone number?
- The practice phone number listed in the NPPES registry for Charles Hardin is (617) 726-2000.
- Does Charles Hardin accept Medicare?
- Charles Hardin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Hardin's NPI active?
- Yes — Charles Hardin's NPI (1336173087) is active in the NPPES registry as of the last update on 2010-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.