Gary R. Hattan, MD
Family Medicine Physician · Sioux City, IA
Gary R. Hattan, MD is a family medicine physician with a practice address in Sioux City, Iowa, and NPI 1619961729, issued on Sep 2, 2005. Check the license (Iowa 31287, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Gary R. Hattan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 31287 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1021 Nebraska St, Sioux City, IA 51104
- Phone
- (712) 252-2477
- Enumerated
- Sep 2, 2005
- Record last updated
- Mar 1, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (712) 252-5516
- Medicaid ID
- 0092080 IA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,336 in Iowa → Look up another NPI →
Also registered at 1021 Nebraska St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Chilton, ARNPFamily Nurse Practitioner1982637310
- Mary Wilson, MSN, ARNP, FNP-BCFamily Nurse Practitioner1093869380
Verify Gary R. Hattan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 31287Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
132 Medicare Part D claims for 12 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Hydrochlorothiazide15 claims
- Omeprazole14 claims
- Amlodipine Besylate13 claims
- Levothyroxine Sodium13 claims
- Lisinopril13 claims
- Atorvastatin Calcium12 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.
Gary R. Hattan among 2,336 family medicine physician records in Iowa
Gary R. Hattan, MD is one of 2,336 family medicine physician records with a practice address in Iowa. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2010 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
88 family medicine physician records list a practice address in Sioux City
They are 88 of the 1,486 NPPES records with a practice address in Sioux City, and 2,336 family medicine physician records in Iowa.
All 2,336 in Iowa → Every provider in Sioux City → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rick Colwell, D.O.Sioux City, IA 511041396710497
- Michael Jung, MDSioux City, IA 511041023093580
- Frank Marino, DOSioux City, IA 511041699740159
- Gerald McGowan, M.D.Sioux City, IA 511041265418644
- Terry Mitchell, MDSioux City, IA 511041720053796
- Paul Peterson, DOSioux City, IA 511041326013426
- Amy Rief-Elks, D.O.Sioux City, IA 511041194790659
- John Roberts, MDSioux City, IA 511041164497137
Common questions
What is Gary R. Hattan, MD's NPI number?
Gary R. Hattan, MD's National Provider Identifier (NPI) is 1619961729, issued on Sep 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gary R. Hattan, MD located?
The NPPES record lists a practice address at 1021 Nebraska St, Sioux City, IA, 51104. Phone: (712) 252-2477. Providers update this record themselves, so call before visiting.
How can I verify Gary R. Hattan, MD's license?
NPPES lists Iowa license number 31287, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gary R. Hattan, MD prescribe under Medicare Part D?
In 2024, Gary R. Hattan, MD had 132 Medicare Part D claims for 12 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.