Quick answers
- Does Anthony P. Nicolaysen accept Medicare assignment?
- Yes. Medicare's clinician data says Anthony P. Nicolaysen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Anthony P. Nicolaysen see?
- In 2024, CMS data shows 538 Original Medicare patients and 2,327 services for Anthony P. Nicolaysen. This counts Original Medicare only and measures volume, not quality.
- What is Anthony P. Nicolaysen's NPI number?
- 1154869576. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Anthony P. Nicolaysen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 538 |
|---|---|
| Services billed to Medicare | 2,327 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)644 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)280 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)254 services
- Hemodialysis procedure with physician evaluation (90935)208 services
- Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)169 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease75%
- Diabetes71%
- Heart failure66%
- Ischemic heart disease57%
Hospitals where Anthony P. Nicolaysen works
Medicare's Facility Affiliation Data lists Anthony P. Nicolaysen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Henry Mayo Newhall HospitalValencia, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050624
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050116
- Pacifica Hospital of the ValleySun Valley, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050378
- Providence Holy Cross Medical CenterMission Hills, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050278
- Valley Presbyterian HospitalVan Nuys, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050126
Practice locations
Addresses where Anthony P. Nicolaysen is enrolled with Medicare (CMS data updated October 2, 2026).
- 11550 Indian Hills Rd, Suite 371Mission Hills, CA 91345 (818) 365‑1194
- 23421 Lyons AveSanta Clarita, CA 91355 (661) 753‑9891
- 9400 Brighton Way, Suite 210Beverly Hills, CA 90210 (310) 362‑1255
Group practices
Medicare enrollment lists Anthony P. Nicolaysen as a member of these groups (CMS data updated October 2, 2026).
- Prohealth Partners, a Medical Group239 clinicians in the group
- Kidney Consultants Medical Group Inc13 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Mission Hills
Clinicians with the same Medicare primary specialty in Mission Hills, CA — not a recommendation.
Other clinicians in Prohealth Partners, a Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Oregon Health Sciences University School Of Medicine |
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154869576 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians