Daniel A. Graybill, MD
Internal Medicine Physician · Tucson, AZ
Daniel A. Graybill, MD is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1639137359, issued on May 2, 2006. Check the license (Arizona 27082, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Daniel A. Graybill
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 27082 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 3190 N Swan RD, Tucson, AZ 85712
- Phone
- (520) 547-9700
- Enumerated
- May 2, 2006
- Record last updated
- Jun 25, 2026
- Fax
- (521) 547-9719
- Medicare enrollment
- Enrolled (PECOS I20100113000371); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 3190 N Swan RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Daniel A. Graybill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 27082Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
7,876 Medicare Part D claims for 723 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 133 claims were for opioids.
Most prescribed
- Atorvastatin Calcium393 claims
- Amlodipine Besylate353 claims
- Lisinopril338 claims
- Levothyroxine Sodium291 claims
- Losartan Potassium273 claims
- Simvastatin214 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Arizona Community Physicians PCTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel A. Graybill among 2,853 internal medicine physician records in Arizona
Daniel A. Graybill, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1991 · median 2003 among the 1,643 with a school on file
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Tucson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William Abraham, MDTucson, AZ 857121669468195
- Sheela Bhat, M.D.Tucson, AZ 857121598752008
- Muralikrishna Bhat, M.D.Tucson, AZ 857121114914637
- Douglas Bischoff, M.D.Tucson, AZ 857121821085333
- George Haloftis, D.O.Tucson, AZ 857121740277268
- Thomas Headlee, M.D.Tucson, AZ 857121194711630
- Kathleen Iveson, M.D.Tucson, AZ 857121720074263
- Gerome Kantor, MDTucson, AZ 857121407850290
Common questions
What is Daniel A. Graybill, MD's NPI number?
Daniel A. Graybill, MD's National Provider Identifier (NPI) is 1639137359, issued on May 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel A. Graybill, MD located?
The NPPES record lists a practice address at 3190 N Swan RD, Tucson, AZ, 85712. Phone: (520) 547-9700. Providers update this record themselves, so call before visiting.
How can I verify Daniel A. Graybill, MD's license?
NPPES lists Arizona license number 27082, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Daniel A. Graybill, MD prescribe under Medicare Part D?
In 2024, Daniel A. Graybill, MD had 7,876 Medicare Part D claims for 723 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.