Physician Profile
Unclaimed ProfileAbout WALTER
Christopher A Walter, D.O. is a healthcare provider in Sonoma, CA specialising in orthopedic surgery. Christopher trained at College of Osteopathic Physicians and Surgeons of Los Angeles, graduating in 2004. Christopher is also listed as specialising in orthopaedic surgery.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Walter specialise in?
Dr. Walter is an orthopedic surgeon in Sonoma, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ORTHOPEDIC SURGERY”.
NPI registry
Where is Dr. Walter located?
Dr. Walter is listed at 347 ANDRIEUX ST, Sonoma, CA 95476. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Walter's phone number?
The number on file is (707) 721-8830. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Walter's NPI number?
Dr. Walter's National Provider Identifier is 1447420732. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Walter go to medical school?
Dr. Walter attended College of Osteopathic Physicians and Surgeons of Los Angeles, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Walter been practising?
Dr. Walter has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Walter do most often?
According to Medicare billing data, Dr. Walter performs procedures including aspiration and/or injection of fluid from large joint, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Walter confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Walter. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (707) 721-8830
- Email not available
Practice Locations
347 ANDRIEUX ST
Sonoma, CA 95476
Procedures Most Often Billed to Medicare
1,942 services · 452 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
46 |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
1,411 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
201 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
151 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
72 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
42 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
19 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other orthopedic surgeons in Sonoma 4
Same specialty, same city.
More connections — 10 related providers in 3 groups
Trained at College of Osteopathic Physicians and Surgeons of Los Angeles 1
Other providers in the same specialty who trained at the same institution.
Class of 2004 at College of Osteopathic Physicians and Surgeons of Los Angeles 1
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.