Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Family Practice

Christian S. Muller, DO

Works at hospitals in Cortlandt Manor, NY · Mount Kisco, NY · Sleepy Hollow, NY · New York

Summary

Dr. Christian S. Muller, DO is a family doctor at 45 Crossways Park Dr W, Woodbury, NY 11797. Phone: (516) 422-8080. Accepts Medicare assignment. In 2024, Christian S. Muller had 297 Original Medicare patients and 6,371 services. NPI 1225520059. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Christian S. Muller, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Christian S. Muller accept Medicare assignment?
Yes. Medicare's clinician data says Christian S. Muller 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 Christian S. Muller see?
In 2024, CMS data shows 297 Original Medicare patients and 6,371 services for Christian S. Muller. This counts Original Medicare only and measures volume, not quality.
What is Christian S. Muller's NPI number?
1225520059. 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 Christian S. Muller, 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 patients297
Services billed to Medicare6,371
Different services or procedures61
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Injection, methylprednisolone acetate, 1 mg (J1010)4,602 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)233 services
  3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)183 services
  4. Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)97 services
  5. X-ray of knee, 3 views (73562)60 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%
  • Arthritis75%
  • Diabetes36%
  • Ischemic heart disease29%
  • Anxiety22%

Hospitals where Christian S. Muller works

Medicare's Facility Affiliation Data lists Christian S. Muller 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.

  • Hudson Valley Hospital CenterCortlandt Manor, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330267
  • Northern Westchester HospitalMount Kisco, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330162
  • Phelps HospitalSleepy Hollow, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330261

Practice locations

Addresses where Christian S. Muller is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Christian S. Muller as a member of this group (CMS data updated October 2, 2026).

  • True North Medical Group PC188 clinicians in the group

Specialties

Find other Family Practice doctors in New York →

Other family doctors in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

All family doctors in New York →

Other clinicians in True North Medical Group PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialDO
Medical schoolTouro Un Col Of Osteopathic Medicine, New York
Graduation year2018 (8 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1225520059
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians