Irene Enzensperger, MD
NPI 1174693659 · Family Medicine Physician · Upland, CA
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irene Enzensperger, MD is a Family Medicine Physician provider in Upland, CA (NPI 1174693659).
Provider details
- NPI number
- 1174693659
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G23211 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
284 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 181 | $128 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 86 | $180 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 17 | $131 |
Typical Medicare-allowed amounts for these services range $128–$180 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 77 | 22 |
| Levothyroxine Sodium | 74 | 23 |
| Losartan Potassium | 55 | 19 |
| Fenofibrate,micronizedbrand: Fenofibrate | 34 | — |
| Atorvastatin Calcium | 30 | 11 |
| Hydrochlorothiazide | 22 | — |
| Furosemide | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Irene Enzensperger's NPI number?
- Irene Enzensperger's National Provider Identifier (NPI) is 1174693659, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irene Enzensperger's specialty?
- Irene Enzensperger is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Irene Enzensperger located?
- Irene Enzensperger's practice location on file with NPPES is 1060 E Foothill Blvd Ste 202, Upland, CA 91786-4017.
- What is Irene Enzensperger's phone number?
- The practice phone number listed in the NPPES registry for Irene Enzensperger is (909) 949-0220.
- Does Irene Enzensperger accept Medicare?
- Irene Enzensperger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irene Enzensperger's NPI active?
- Yes — Irene Enzensperger's NPI (1174693659) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.