Don Duff, FNP-C
NPI 1588606636 · Nurse Practitioner · Chattanooga, TN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Don Duff, FNP-C is a Nurse Practitioner provider in Chattanooga, TN (NPI 1588606636).
Provider details
- NPI number
- 1588606636
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Male
- Sole proprietor
- No
- License
- DC0000000723 (TN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Chiropractic Providers
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
611 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 | 342 | $98 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 61 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 43 | $71 |
| X-Ray of Lower and Sacral Spine, Minimum of 4 Views72110 | 42 | $34 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 40 | $25 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Meloxicam | 164 | 67 |
| Diazepam | 45 | 38 |
| Methocarbamol | 45 | 31 |
| Gabapentin | 42 | 29 |
| Methylprednisolone | 35 | 32 |
| Triazolam | 29 | 25 |
| Tramadol Hcl | 27 | 15 |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$34 across 2 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
- 2006-06-12
- Last updated
- 2017-01-19
Frequently asked questions
- What is Don Duff's NPI number?
- Don Duff's National Provider Identifier (NPI) is 1588606636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Don Duff's specialty?
- Don Duff is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Don Duff located?
- Don Duff's practice location on file with NPPES is 1736 Gunbarrel Rd, Chattanooga, TN 37421-3127.
- What is Don Duff's phone number?
- The practice phone number listed in the NPPES registry for Don Duff is (423) 756-6623.
- Does Don Duff accept Medicare?
- Don Duff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Don Duff's NPI active?
- Yes — Don Duff's NPI (1588606636) is active in the NPPES registry as of the last update on 2017-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.