NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1134380371 FNP-C
Verify on CMS → Robbin Koehler, FNP-C
Family Nurse Practitioner in San Marcos, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
356
Medicare Part D claims · 231 beneficiaries · Family Nurse Practitioner avg: 1K
What the federal data shows
Robbin Koehler, FNP-C filed 356 Medicare Part D claims in 2023 as a Family Nurse Practitioner in San Marcos, Texas.
- 356
- Part D claims, 2023
- ≥57th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1134380371 · Family Nurse Practitioner
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1134380371
- ENUM-MID 2008
- TAX-MEGA 211K Family Nurse
- RX-LIGHT 356
- BOOK-MID 18,789 in Texas
- PHOTO-ENUM Kevin Morton · 2008
Robbin Koehler, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
356 ≥ 57th percentile 57% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Robbin Koehler, FNP-C?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
356 71% vs specialty avg
Specialty distribution in Texas
How Family Nurse Practitioner compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Nurse Practitioner. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1134380371 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | FNP-C |
| Gender | Female |
| NPI Issued | 06/20/2008 |
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Robbin Koehler, FNP-C. To verify Robbin Koehler, FNP-C's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
356
Total Claims
$4K
Total Drug Cost
231
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 360
- Total Day Supply
- 3,615
- Generic Drug Cost
- $3K
- Opioid Claims
- 41 (11.5% rate)
- Antibiotic Claims
- 146
Patient Demographics
- Average Patient Age
- 69.9 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 44, 65-74: 108, 75-84: 60, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Robbin Koehler, FNP-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Cephalexin
Cephalexin
44 claims
- Tramadol Hcl
Tramadol Hcl
26 claims
- Amoxicillin
Amoxicillin
21 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
20 claims
- Doxycycline Hyclate
Doxycycline Hyclate
20 claims
- Ibuprofen
Ibuprofen
19 claims
- Methylprednisolone 17
Methylprednisolone
17 claims
- Albuterol Sulfate … 16
Albuterol Sulfate Hfa
16 claims
| Drug | Claims |
|---|---|
| Cephalexin | 44 |
| Tramadol Hcl | 26 |
| Amoxicillin | 21 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 20 |
| Doxycycline Hyclate | 20 |
| Ibuprofen | 19 |
| Methylprednisolone | 17 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 16 |
| Methocarbamol | 15 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Robbin Koehler, FNP-C fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Robbin Koehler, FNP-C's 356 claims are below the specialty average of 1,222.
Nationwide Family Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Koehler, both outside Texas so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Nurse Practitioner Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Koehler.
One of 18,789 Family Nurse Practitioner providers enrolled in Texas, 5 are shown here.
Dr. Ashley Aaron
FNP
Waco, TX
Dr. Christina Aaron
FNP
Texarkana, TX
Dr. Lori Aaron
FNP-C
Frisco, TX
Dr. Lauren Aase
FNP
Sheppard Afb, TX
Olivia Ababio
Cypress, TX
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Robbin Koehler, FNP-C's specialty? ▼
Robbin Koehler, FNP-C specializes in Family Nurse Practitioner and practices in San Marcos, Texas. Credentials: FNP-C.
How much does Robbin Koehler, FNP-C prescribe under Medicare Part D? ▼
In 2023, Robbin Koehler, FNP-C wrote 356 Medicare Part D claims totaling $4K in drug costs for 231 beneficiaries.
Where is Robbin Koehler, FNP-C located? ▼
Robbin Koehler, FNP-C is located at 1941 S IH 35, San Marcos, TX, 78666. Phone: (512) 353-6425.
What is Robbin Koehler, FNP-C's NPI number? ▼
Robbin Koehler, FNP-C's National Provider Identifier (NPI) is 1134380371, issued on 06/20/2008.
Does Robbin Koehler, FNP-C prescribe opioids? ▼
Yes, Robbin Koehler, FNP-C had 41 opioid claims in 2023 with an opioid prescribing rate of 11.5%.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Robbin Koehler, FNP-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Robbin Koehler, FNP-C's most frequently prescribed drugs include Cephalexin, Tramadol Hcl, Amoxicillin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robbin Koehler, FNP-C accept Medicare? ▼
Robbin Koehler, FNP-C appears in CMS Medicare data with 356 Part D claims and 231 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robbin Koehler, FNP-C's credentials? ▼
Robbin Koehler, FNP-C's NPI is 1134380371 with credentials FNP-C. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.