Nancy Alison, M.D.
NPI 1679566962 · Ophthalmology Physician · Johnson City, TN
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Alison, M.D. is a Ophthalmology Physician provider in Johnson City, TN (NPI 1679566962).
Provider details
- NPI number
- 1679566962
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 24597 (TN)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
281 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 Problem Focused Exam of Visual System92012 | 119 | $82 |
| Established Patient Complete Exam of Visual System92014 | 75 | $116 |
| Exam of Visual Field With Extended Testing92083 | 36 | $58 |
| Imaging of Optic Nerve92133 | 32 | $32 |
| Imaging of Retina92134 | 19 | $36 |
Typical Medicare-allowed amounts for these services range $32–$116 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 227 | 64 |
| Brimonidine Tartrate | 72 | 19 |
| Timolol Maleate | 63 | 20 |
| Cyclosporinebrand: Restasis | 38 | 14 |
| Bimatoprostbrand: Lumigan | 35 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 34 | — |
| Dorzolamide Hcl | 25 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 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
Registry dates
- Enumerated
- 2005-08-23
- Last updated
- 2018-07-17
Frequently asked questions
- What is Nancy Alison's NPI number?
- Nancy Alison's National Provider Identifier (NPI) is 1679566962, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Alison's specialty?
- Nancy Alison is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Alison located?
- Nancy Alison's practice location on file with NPPES is 325 N State of Franklin Rd, Johnson City, TN 37604.
- What is Nancy Alison's phone number?
- The practice phone number listed in the NPPES registry for Nancy Alison is (423) 439-7201.
- Does Nancy Alison accept Medicare?
- Nancy Alison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Alison's NPI active?
- Yes — Nancy Alison's NPI (1679566962) is active in the NPPES registry as of the last update on 2018-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.