Daniel Graybill, MD
NPI 1639137359 · Internal Medicine Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel Graybill, MD is a Internal Medicine Physician provider in Tucson, AZ (NPI 1639137359).
Provider details
- NPI number
- 1639137359
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 27082 (AZ)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
4,137 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 711 | $91 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 484 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 410 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 376 | $8 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 310 | $13 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 306 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 117 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 393 | 125 |
| Amlodipine Besylate | 353 | 103 |
| Lisinopril | 338 | 109 |
| Levothyroxine Sodium | 291 | 88 |
| Losartan Potassium | 273 | 85 |
| Simvastatin | 214 | 66 |
| Tamsulosin Hcl | 184 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-02
- Last updated
- 2026-04-03
- Certified
- 2026-04-03
Frequently asked questions
- What is Daniel Graybill's NPI number?
- Daniel Graybill's National Provider Identifier (NPI) is 1639137359, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Graybill's specialty?
- Daniel Graybill is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel Graybill located?
- Daniel Graybill's practice location on file with NPPES is 3190 N Swan Rd, Tucson, AZ 85712-1227.
- What is Daniel Graybill's phone number?
- The practice phone number listed in the NPPES registry for Daniel Graybill is (520) 547-9700.
- Does Daniel Graybill accept Medicare?
- Daniel Graybill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Daniel Graybill's NPI active?
- Yes — Daniel Graybill's NPI (1639137359) is active in the NPPES registry as of the last update on 2026-04-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.