Gretchen Elizabeth Farmer, MD
Internal Medicine Physician · Union, MO
Gretchen Elizabeth Farmer, MD is an internal medicine physician with a practice address in Union, Missouri, and NPI 1720283450, issued on Jun 21, 2007. Check the license (Missouri 2007005528, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Gretchen Elizabeth Farmer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2007005528 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1935 Prairie Dell RD Ste 400, Union, MO 63084
- Phone
- (636) 649-3085
- Enumerated
- Jun 21, 2007
- Record last updated
- Jun 24, 2024
- Fax
- (636) 649-3087
- Medicare enrollment
- Enrolled (PECOS I20070928000052); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2003
- Entity
- Type 1 · individual
Also registered at 1935 Prairie Dell RD Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Casey Buncher, FNP-CFamily Nurse Practitioner1891336178
- Sarah Chalk, APRN, FNP-BCFamily Nurse Practitioner1104590801
- Elizabeth Hammer, M.D.Pediatrics Physician1073540886
- Joi Irving, M.D.Internal Medicine Physician1457508665
Verify Gretchen Elizabeth Farmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2007005528Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average internal medicine physician in 2024
10,385 Medicare Part D claims for 422 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 316 claims were for opioids.
Most prescribed
- Levothyroxine Sodium386 claims
- Atorvastatin Calcium366 claims
- Amlodipine Besylate360 claims
- Rosuvastatin Calcium324 claims
- Omeprazole263 claims
- Lisinopril251 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: $1,176.98
61 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. 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
- Mercy Clinic East CommunitiesUnion, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
5 internal medicine physician records list a practice address in Union
They are 5 of the 228 NPPES records with a practice address in Union, and 2,604 internal medicine physician records in Missouri.
All 5 in Union → All 2,604 in Missouri → Every provider in Union →
Other internal medicine physician records in Missouri
- Betty Abban, M.D.Springfield, MO1063893162
- Amer Abbas, MDSaint Louis, MO1508480666
- Fizza Abbas, MDSaint Louis, MO1588079230
- Marghoob Abbas, M.D.St Joseph, MO1588603781
- Muhammad Khalid Abbas, M.D.Springfield, MO1447877089
- Sundas Abbas, MDRichmond Heights, MO1649790486
- Hajira Abbasi, DOSaint Louis, MO1194036947
- Catey Abbott, DOSaint Louis, MO1699355347
- David Abbott, MDRichmond Heights, MO1568448850
- Wael Abduljaber, MDSaint Louis, MO1174101489
Common questions
What is Gretchen Elizabeth Farmer, MD's NPI number?
Gretchen Elizabeth Farmer, MD's National Provider Identifier (NPI) is 1720283450, issued on Jun 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen Elizabeth Farmer, MD located?
The NPPES record lists a practice address at 1935 Prairie Dell RD Ste 400, Union, MO, 63084. Phone: (636) 649-3085. Providers update this record themselves, so call before visiting.
How can I verify Gretchen Elizabeth Farmer, MD's license?
NPPES lists Missouri license number 2007005528, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gretchen Elizabeth Farmer, MD prescribe under Medicare Part D?
In 2024, Gretchen Elizabeth Farmer, MD had 10,385 Medicare Part D claims for 422 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.