Nicholas Gerken, MD
NPI 1851688758 · Orthopaedic Surgery Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Gerken, MD is a Orthopaedic Surgery Physician provider in San Antonio, TX (NPI 1851688758).
Provider details
- NPI number
- 1851688758
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- R4046 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,065 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 170 | $87 |
| X-Ray of Knee, 3 Views73562 | 162 | $34 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 131 | $71 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 129 | $123 |
| X-Ray of Hip, 2-3 Views73502 | 123 | $42 |
| X-Ray of Knee, 4 Or More Views73564 | 79 | $42 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Celecoxib | 244 | 135 |
| Gabapentin | 217 | 125 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 191 | 95 |
| Methocarbamol | 154 | 98 |
| Ondansetron Hcl | 123 | 114 |
| Cephalexin | 96 | 61 |
| Doxycycline Hyclate | 37 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,473 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-30
- Last updated
- 2022-01-18
- Certified
- 2020-08-20
Frequently asked questions
- What is Nicholas Gerken's NPI number?
- Nicholas Gerken's National Provider Identifier (NPI) is 1851688758, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Gerken's specialty?
- Nicholas Gerken is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Gerken located?
- Nicholas Gerken's practice location on file with NPPES is 1139 E Sonterra Blvd Ste 401, San Antonio, TX 78258-4987.
- What is Nicholas Gerken's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Gerken is (210) 874-3359.
- Does Nicholas Gerken accept Medicare?
- Nicholas Gerken is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Gerken's NPI active?
- Yes — Nicholas Gerken's NPI (1851688758) is active in the NPPES registry as of the last update on 2022-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.