Douglas Marlow, MD
NPI 1659360295 · Internal Medicine Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Marlow, MD is a Internal Medicine Physician provider in Knoxville, TN (NPI 1659360295).
Provider details
- NPI number
- 1659360295
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD35847 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
3,661 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 398 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 375 | $10 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 342 | $123 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 319 | $16 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 286 | $8 |
| Blood Test, Lipids (cholesterol and Triglycerides) |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 125 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 548 | 142 |
| Amlodipine Besylate | 389 | 109 |
| Losartan Potassium | 276 | 74 |
| Levothyroxine Sodium | 268 | 67 |
| Hydrochlorothiazide | 267 | 65 |
| Meloxicam | 184 | 52 |
| Pantoprazole Sodium | 180 |
Practice location
Mailing address
Additional practice locations (1)
- 7625 Chapman Hwy Ste 103Knoxville, TN 37920-2353Phone: (865) 632-5893Fax: (865) 374-2164
Registry dates
- Enumerated
- 2005-10-17
- Last updated
- 2025-08-20
- Certified
- 2025-08-20
Frequently asked questions
- What is Douglas Marlow's NPI number?
- Douglas Marlow's National Provider Identifier (NPI) is 1659360295, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Marlow's specialty?
- Douglas Marlow is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Marlow located?
- Douglas Marlow's practice location on file with NPPES is 6600 Nightingale Ln, Knoxville, TN 37909-2754.
- What is Douglas Marlow's phone number?
- The practice phone number listed in the NPPES registry for Douglas Marlow is (865) 632-5885.
- Does Douglas Marlow accept Medicare?
- Douglas Marlow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Marlow's NPI active?
- Yes — Douglas Marlow's NPI (1659360295) is active in the NPPES registry as of the last update on 2025-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.