R. Preston Harrison
Internal Medicine Physician · Birmingham, AL
R. Preston Harrison is an internal medicine physician with a practice address in Birmingham, Alabama, and NPI 1467564195, issued on Aug 31, 2006. Check the license (Alabama 21636, as entered in NPPES) on the Alabama Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- R. Preston Harrison
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 21636 AL
Self-reported in NPPES; status is on the state search - Practice location
- 1717 6TH Ave S, Birmingham, AL 35233
- Phone
- (800) 822-8816
- Enumerated
- Aug 31, 2006
- Record last updated
- Dec 16, 2022
- Medicare enrollment
- Enrolled (PECOS I20070611000228); accepts Medicare assignment
- Medical or professional school
- University Of Alabama School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,705 in Alabama → Look up another NPI →
Also registered at 1717 6TH Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Catherine AdamsFamily Nurse Practitioner1184173502
- Dylan AddisAnesthesiology Physician1922425842
- Monica AgarwalEndocrinology, Diabetes & Metabolism Physician1659565513
- Shruti AgnihotriNeurology Physician1699973669
- Patricia AikenHospitalist Physician1124318340
- Alian Al-BalasNephrology Physician1184936304
Verify R. Preston Harrison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersAlabama Board of Medical Examiners
Search for license 21636Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,668 Medicare Part D claims for 207 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Eliquis135 claims
- Losartan Potassium114 claims
- Rosuvastatin Calcium101 claims
- Atorvastatin Calcium94 claims
- Amlodipine Besylate91 claims
- Levothyroxine Sodium79 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.
Industry payments in 2024: $79.12
5 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University OF Alabama Health Services Foundation, PCBirmingham, AL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
R. Preston Harrison among 1,705 internal medicine physician records in Alabama
R. Preston Harrison is one of 1,705 internal medicine physician records with a practice address in Alabama. 84% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 49% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1996 · median 2003 among the 1,136 with a school on file
- Record last updated2022 · 55% 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 Alabama practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
487 internal medicine physician records list a practice address in Birmingham
They are 487 of the 15,795 NPPES records with a practice address in Birmingham, and 1,705 internal medicine physician records in Alabama.
All 1,705 in Alabama → Every provider in Birmingham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andrew Allen, M.D.Birmingham, AL 352331891759809
- Jeroan Allison, MDBirmingham, AL 352331003860016
- Cynthia Baker, MDBirmingham, AL 352331629023155
- Mary Balkovetz, MDBirmingham, AL 352331881641181
- Brenda Baumann, M.D.Birmingham, AL 352331568426583
- Raegan Durant, MD, MPHBirmingham, AL 352331073561262
- Michael Fleenor, M.D.Birmingham, AL 352331376515270
- Tracey Humbert, MDBirmingham, AL 352331588615314
Common questions
What is R. Preston Harrison's NPI number?
R. Preston Harrison's National Provider Identifier (NPI) is 1467564195, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is R. Preston Harrison located?
The NPPES record lists a practice address at 1717 6TH Ave S, Birmingham, AL, 35233. Phone: (800) 822-8816. Providers update this record themselves, so call before visiting.
How can I verify R. Preston Harrison's license?
NPPES lists Alabama license number 21636, as entered by the provider. Search the Alabama Board of Medical Examiners at https://www.albme.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does R. Preston Harrison prescribe under Medicare Part D?
In 2024, R. Preston Harrison had 2,668 Medicare Part D claims for 207 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.