NPPES file of Aug 9, 2026

Rachel Lynn Fishman Oiknine, M.D.

Endocrinology, Diabetes & Metabolism Physician · Chesterfield, MO

Rachel Lynn Fishman Oiknine, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Chesterfield, Missouri, and NPI 1003840349, issued on Jul 11, 2006. Check the license (Missouri 217339, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1003840349
Name
Rachel Lynn Fishman Oiknine
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
217339 MO
Self-reported in NPPES; status is on the state search
Practice location
222 S Woods Mill RD, Chesterfield, MO 63017
Phone
(314) 469-6224
Enumerated
Jul 11, 2006
Record last updated
Sep 30, 2011 (not updated in 15 years: call before relying on the address or phone)
Fax
(314) 469-0744
Medicare enrollment
Enrolled (PECOS I20050826000151); accepts Medicare assignment
Medical or professional school
University Of Missouri, Columbia School Of Medicine, 2000
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest endocrinology, diabetes & metabolism physician records → All 206 in Missouri → Look up another NPI →

Also registered at 222 S Woods Mill RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Nadya Ajanee, M.D.Internal Medicine Physician1639284276
  2. Afshin Amini, MDInternal Medicine Physician1871086090
  3. Venkat Arukala, M.D.Internal Medicine Physician1205210887
  4. Richard Bell, MDSpecialist1780679373
  5. John Best, MDPulmonary Disease Physician1053429977
  6. Ronald Bilchik, M.D.Specialist1992740435

Verify Rachel Lynn Fishman Oiknine in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 217339    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Missouri license search

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54% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024

1,203 Medicare Part D claims for 247 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.

  1. Rachel Fishman Oiknine1,203
  2. Specialty average2,630

Most prescribed

  1. Levothyroxine Sodium539 claims
  2. Synthroid384 claims
  3. Alendronate Sodium41 claims
  4. Vitamin D233 claims
  5. Liothyronine Sodium25 claims
  6. Methimazole23 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: $451.12

23 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Rachel Fishman Oiknine$451.12
  2. Specialty average$5,742.15

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

  1. Diabetes And Endocrinology Specialists IncChesterfield, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Rachel Lynn Fishman Oiknine among 206 endocrinology, diabetes & metabolism physician records in Missouri

Rachel Lynn Fishman Oiknine, M.D. is one of 206 endocrinology, diabetes & metabolism physician records with a practice address in Missouri. 88% 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 8% of them.

  • NPI issued2006 · 8% of these records are older, 50% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated2000 · median 2003 among the 148 with a school on file
  • Record last updated2011 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in Missouri

There are 206 endocrinology, diabetes & metabolism physician records in Missouri.

All 206 in Missouri → Every provider in Chesterfield → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Vaishaliben Ahir, MDChesterfield, MO 630171376706861
  2. Karen Chang-Chen, MDChesterfield, MO 630171508916495
  3. Edwin Cunningham, MDChesterfield, MO 630171538267844
  4. Norman Fishman, M.D.Chesterfield, MO 630171528086659
  5. Katharine Mikulec, M.D.Chesterfield, MO 630171336254887
  6. Soumya Nadella, M.D.Chesterfield, MO 630171316350028
  7. Ralph Oiknine, M.D.Chesterfield, MO 630171255365581
  8. Purvi Parikh, M.D.Chesterfield, MO 630171346229838

Common questions

What is Rachel Lynn Fishman Oiknine, M.D.'s NPI number?

Rachel Lynn Fishman Oiknine, M.D.'s National Provider Identifier (NPI) is 1003840349, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Rachel Lynn Fishman Oiknine, M.D. located?

The NPPES record lists a practice address at 222 S Woods Mill RD, Chesterfield, MO, 63017. Phone: (314) 469-6224. Providers update this record themselves, so call before visiting.

How can I verify Rachel Lynn Fishman Oiknine, M.D.'s license?

NPPES lists Missouri license number 217339, 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 Rachel Lynn Fishman Oiknine, M.D. prescribe under Medicare Part D?

In 2024, Rachel Lynn Fishman Oiknine, M.D. had 1,203 Medicare Part D claims for 247 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.