John Diefenderfer, D.O.
NPI 1407236185 · Family Medicine Physician · Waterville, ME
Enrolled with Medicare as Practitioner - Osteopathic Manipulative Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Diefenderfer, D.O. is a Family Medicine Physician provider in Waterville, ME (NPI 1407236185).
Provider details
- NPI number
- 1407236185
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- UO 4638 (FL)
Specialties & taxonomies
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
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
56 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 24 | $61 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $90 |
| Osteopathic Manipulative Treatment, 3-4 Body Regions98926 | 12 | $32 |
Typical Medicare-allowed amounts for these services range $32–$90 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 15 E Chestnut StAugusta, ME 04330Phone: (207) 623-6663Fax: (207) 626-1902
Registry dates
- Enumerated
- 2015-06-08
- Last updated
- 2021-01-20
- Certified
- 2021-01-20
Frequently asked questions
- What is John Diefenderfer's NPI number?
- John Diefenderfer's National Provider Identifier (NPI) is 1407236185, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Diefenderfer's specialty?
- John Diefenderfer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Diefenderfer located?
- John Diefenderfer's practice location on file with NPPES is 149 North St, Waterville, ME 04901-4974.
- What is John Diefenderfer's phone number?
- The practice phone number listed in the NPPES registry for John Diefenderfer is (207) 861-5101.
- Does John Diefenderfer accept Medicare?
- John Diefenderfer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Diefenderfer's NPI active?
- Yes — John Diefenderfer's NPI (1407236185) is active in the NPPES registry as of the last update on 2021-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.