Stephen Isernhagen
NPI 1720444631 · Physician Assistant · Norman, OK
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Isernhagen is a Physician Assistant provider in Norman, OK (NPI 1720444631).
Provider details
- NPI number
- 1720444631
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 2613 (OK)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,059 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) |
|---|---|---|
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 293 | $42 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 163 | $53 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 107 | $78 |
| X-Ray of Hip, 2-3 Views73502 | 72 | $9 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 69 | $42 |
| X-Ray of Knee, 4 Or More Views73564 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Meloxicam | 27 | — |
| Methylprednisolone | 23 | 20 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$140 across 1 record (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
Additional practice locations (1)
- 9600 Broadway ExtOklahoma City, OK 73114-7408Phone: (405) 230-9000Fax: (405) 230-9157
Registry dates
- Enumerated
- 2016-01-07
- Last updated
- 2019-08-09
Frequently asked questions
- What is Stephen Isernhagen's NPI number?
- Stephen Isernhagen's National Provider Identifier (NPI) is 1720444631, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Isernhagen's specialty?
- Stephen Isernhagen is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Stephen Isernhagen located?
- Stephen Isernhagen's practice location on file with NPPES is 3700 36th Ave Nw, Norman, OK 73072-1803.
- What is Stephen Isernhagen's phone number?
- The practice phone number listed in the NPPES registry for Stephen Isernhagen is (405) 230-9600.
- Does Stephen Isernhagen accept Medicare?
- Stephen Isernhagen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Isernhagen's NPI active?
- Yes — Stephen Isernhagen's NPI (1720444631) is active in the NPPES registry as of the last update on 2019-08-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.