CHRISTOPHER A WALTER D.O.
NPI 1447420732
Orthopaedic Surgery in Sonoma, CA

Q: What is Christopher Walter's NPI number?

The NPI number for Christopher Walter is 1447420732. It was assigned to this individual provider in the NPPES registry on March 3, 2008.

Q: What is Christopher Walter's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Active since March 03, 2008PECOS Enrolled

347 ANDRIEUX ST, SONOMA, CA 95476(707) 721-8830 Get Directions Write a Review

NPPES record last updated: March 13, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 13, 2026, May 17, 2024, Nov 11, 2021 and 1 more (4 updates tracked since 2021).

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About Christopher A Walter D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHRISTOPHER A WALTER D.O. (NPI 1447420732) is an individual orthopaedic surgery provider in Sonoma, California, licensed in California (20A10826) and active in the NPI registry since March 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Petaluma, and is a graduate of College Of Osteopathic Physicians And Surgeons Of Los Angeles (2004).

NPPES Registry Identity

NPI1447420732

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameCHRISTOPHER A WALTERCredential: D.O.

Location Address347 ANDRIEUX STSonoma, CA 95476-6811

Mailing Address347 Andrieux StSonoma, CA 95476-6811 · (707) 721-8830 · Fax (707) 938-3076

Phone(707) 721-8830

Sole ProprietorNo

Medical School CMSCollege Of Osteopathic Physicians And Surgeons Of Los AngelesGraduated 2004

Enumeration DateMarch 3, 2008

Last NPPES UpdateMarch 13, 20264 updates tracked since enumeration

NPPES CertifiedMarch 13, 2026

✔ NPI 1447420732 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

License✔ Licensed in CA · 20A10826

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

347 ANDRIEUX ST, Sonoma, CA 95476

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Secondary Practice Location 1

Location 1335 S McDowell BlvdPetaluma, CA 94954-3507 · Phone (707) 721-8830 · Fax (707) 938-3076

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Christopher A Walter D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8224184635

PECOS Enrollment IDI20100302000324

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Christopher Walter reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regents Univ Of California Ucsf

36 mi

Internal Medicine

505 PARNASSUS AVE
San Francisco, CA 94143

Reassigned Medicare billing, California enrollment
339 clinicians in this Medicare group

NPI 1124439807 (415) 476-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

201 services139 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

151 services120 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

72 services72 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

46 services42 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

42 services42 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

19 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95476 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$96.16 typical visit price

range $63.04 – $187.01

Typical copayment $24.04 (range $15.76 – $46.75)

Most-billed visit code 99203

Established Patient

$77.94 typical visit price

range $21.02 – $153.40

Typical copayment $19.48 (range $5.25 – $38.35)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. NICOLAS SAWYER M.D.

Emergency Medicine