Lynn Castle, PAC
NPI 1780741223 · Family Medicine Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lynn Castle, PAC is a Family Medicine Physician provider in Knoxville, TN (NPI 1780741223).
Provider details
- NPI number
- 1780741223
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- PAC
- Sex
- Female
- Sole proprietor
- No
- License
- TND00000001152 (TN)
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 tenure25% of score
19 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
148 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 | 132 | $95 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 16 | $71 |
Typical Medicare-allowed amounts for these services range $71–$95 (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 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 82 | 20 |
| Semaglutidebrand: Ozempic | 56 | 11 |
| Famotidine | 51 | 15 |
| Ondansetron Hcl | 48 | 12 |
| Tirzepatidebrand: Mounjaro | 47 | — |
| Omeprazole | 41 | 11 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$405 across 18 records (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
- 2007-01-03
- Last updated
- 2012-05-24
Frequently asked questions
- What is Lynn Castle's NPI number?
- Lynn Castle's National Provider Identifier (NPI) is 1780741223, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lynn Castle's specialty?
- Lynn Castle is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lynn Castle located?
- Lynn Castle's practice location on file with NPPES is 1930 Alcoa Hwy, Knoxville, TN 37920-1500.
- What is Lynn Castle's phone number?
- The practice phone number listed in the NPPES registry for Lynn Castle is (865) 305-9620.
- Does Lynn Castle accept Medicare?
- Lynn Castle is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lynn Castle's NPI active?
- Yes — Lynn Castle's NPI (1780741223) is active in the NPPES registry as of the last update on 2012-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.