Philip Knorr, M.D.
NPI 1801981485 · Urology Physician · Freedom, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Philip Knorr, M.D. is a Urology Physician provider in Freedom, CA (NPI 1801981485).
Provider details
- NPI number
- 1801981485
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G56315 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
1,880 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) |
|---|---|---|
| Urinalysis, Manual Test81002 | 676 | $3 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 641 | $102 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 143 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 125 | $144 |
| Administration of Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96402 | 66 | $41 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 54 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 649 | 201 |
| Finasteride | 498 | 148 |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 288 | 96 |
| Imipramine Hcl | 199 | 54 |
| Mirabegronbrand: Myrbetriq | 126 | 36 |
| Ciprofloxacin Hcl | 53 | 36 |
| Oxybutynin Chloride | 50 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$87 across 4 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
- 2006-10-03
- Last updated
- 2020-02-21
- Certified
- 2020-02-21
Frequently asked questions
- What is Philip Knorr's NPI number?
- Philip Knorr's National Provider Identifier (NPI) is 1801981485, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Philip Knorr's specialty?
- Philip Knorr is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Philip Knorr located?
- Philip Knorr's practice location on file with NPPES is 160 Green Valley Rd, Freedom, CA 95019-3160.
- What is Philip Knorr's phone number?
- The practice phone number listed in the NPPES registry for Philip Knorr is (831) 728-4227.
- Does Philip Knorr accept Medicare?
- Philip Knorr is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Philip Knorr's NPI active?
- Yes — Philip Knorr's NPI (1801981485) is active in the NPPES registry as of the last update on 2020-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.