Diane Armstrong, M.D.
NPI 1104913508 · Family Medicine Physician · Fairfield, OH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Armstrong, M.D. is a Family Medicine Physician provider in Fairfield, OH (NPI 1104913508).
Provider details
- NPI number
- 1104913508
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 35056729 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
966 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 321 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 255 | $85 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 148 | $121 |
| Administration of Influenza Virus VaccineG0008 | 52 | $30 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 38 | $53 |
| Urinalysis, Manual Test81002 | 29 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 179 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 834 | 222 |
| Amlodipine Besylate | 454 | 98 |
| Levothyroxine Sodium | 410 | 96 |
| Gabapentin | 301 | 67 |
| Pantoprazole Sodium | 285 | 78 |
| Lisinopril | 270 | 64 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$33 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 5150 Sandy LnFairfield, OH 45014-2738Phone: (513) 896-9595Fax: (513) 896-4171
Registry dates
- Enumerated
- 2006-10-06
- Last updated
- 2022-04-29
- Certified
- 2022-04-29
Frequently asked questions
- What is Diane Armstrong's NPI number?
- Diane Armstrong's National Provider Identifier (NPI) is 1104913508, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Armstrong's specialty?
- Diane Armstrong is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Armstrong located?
- Diane Armstrong's practice location on file with NPPES is 544 Patterson Blvd, Fairfield, OH 45014-2514.
- What is Diane Armstrong's phone number?
- The practice phone number listed in the NPPES registry for Diane Armstrong is (513) 896-9595.
- Does Diane Armstrong accept Medicare?
- Diane Armstrong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Armstrong's NPI active?
- Yes — Diane Armstrong's NPI (1104913508) is active in the NPPES registry as of the last update on 2022-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.