NPPES file of Aug 9, 2026

Robbin Jean Koehler, FNP-C

Family Nurse Practitioner · San Marcos, TX

Robbin Jean Koehler, FNP-C is a family nurse practitioner with a practice address in San Marcos, Texas, and NPI 1134380371, issued on Jun 20, 2008. Check the license (Texas 689040, as entered in NPPES) with the Texas board that licenses this profession; 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
1134380371
Name
Robbin Jean Koehler
Credential
FNP-C
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
689040 TX
Self-reported in NPPES; status is on the state search
Practice location
1941 S IH 35, San Marcos, TX 78666
Phone
(512) 353-6425
Enumerated
Jun 20, 2008
Record last updated
Apr 29, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(512) 753-4913
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 21,242 in Texas → Look up another NPI →

Verify Robbin Jean Koehler in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Texas board licenses this profession
    Search for license 689040    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
Find the Texas license search

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69% fewer Medicare Part D claims than the average family nurse practitioner in 2024

404 Medicare Part D claims for 250 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.

  1. Robbin Koehler404
  2. Specialty average1,305

Most prescribed

  1. Amoxicillin-Clavulanate Potass71 claims
  2. Azithromycin35 claims
  3. Amoxicillin30 claims
  4. Cephalexin30 claims
  5. Albuterol Sulfate Hfa25 claims
  6. Doxycycline Hyclate23 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.

Robbin Jean Koehler among 21,242 family nurse practitioner records in Texas

Robbin Jean Koehler, FNP-C is one of 21,242 family nurse practitioner records with a practice address in Texas. 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 2008, is newer than 9% of them.

  • NPI issued2008 · 9% of these records are older, 89% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileNo · 53% of these records are
  • Record last updated2013 · 38% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

55 family nurse practitioner records list a practice address in San Marcos

They are 55 of the 1,003 NPPES records with a practice address in San Marcos, and 21,242 family nurse practitioner records in Texas.

All 21,242 in Texas → Every provider in San Marcos → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Mary Andres, FNPSan Marcos, TX 786661902106966
  2. Patricia Ballentine, R.N., MSN, FNP-CSan Marcos, TX 786661770688210
  3. Dana Bourke, NPSan Marcos, TX 786661356591432
  4. Ashley Ferguson, RN, FNP-CSan Marcos, TX 786661093045692
  5. Carol Garner, MSN,CS,FNPSan Marcos, TX 786661295734036
  6. Lydia Glisan, FNPSan Marcos, TX 786661750533543
  7. Laura Greek, FNPSan Marcos, TX 786661871754804
  8. Janan Hall, FNPSan Marcos, TX 786661992903777

Common questions

What is Robbin Jean Koehler, FNP-C's NPI number?

Robbin Jean Koehler, FNP-C's National Provider Identifier (NPI) is 1134380371, issued on Jun 20, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Robbin Jean Koehler, FNP-C located?

The NPPES record lists a practice address at 1941 S IH 35, San Marcos, TX, 78666. Phone: (512) 353-6425. Providers update this record themselves, so call before visiting.

How can I verify Robbin Jean Koehler, FNP-C's license?

NPPES lists Texas license number 689040, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.

How much does Robbin Jean Koehler, FNP-C prescribe under Medicare Part D?

In 2024, Robbin Jean Koehler, FNP-C had 404 Medicare Part D claims for 250 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.