Dr. Christopher Adam Walker, MD
- Medicare services, 2024
- 49
- Medicare patients, 2024
- 38
- Hospital affiliations
- 1
- Industry payments
- $34
- Medical groups
- 2
- Practice address
- 380 West MacArthur Boulevard, Oakland, CA 94609
- Practice phone
- Call (510) 251-0121
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Addiction Medicine & Recovery Services at Oakland Medical Center
Outpatient Addiction Treatment · Oakland, California
Find Dr. Walker's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Christopher Adam Walker is an emergency medicine physician in Oakland, California
Dr. Walker practices at Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California.
Dr. Walker's NPI, 1649469701, was assigned on October 15, 2007. Dr. Walker graduated from Cleveland Medical College, Homeopathic in 2007. Dr. Walker holds California license A106362.
- NPI
- 1649469701NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446431571
- NPI enumeration date
- October 15, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 251-0121
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christopher Adam Walker practices at Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California
Dr. Walker's primary practice is Addiction Medicine & Recovery Services at Oakland Medical Center, at 380 West MacArthur Boulevard, Oakland, CA 94609. The practice phone is (510) 251-0121.
- Addiction Medicine & Recovery Services at Oakland Medical Center380 West MacArthur Boulevard, Oakland, CA 94609Phone(510) 251-0121
Source: Dmand AI Affiliation Data
Dr. Christopher Adam Walker is affiliated with 3 sites of care and 2 medical groups
Dr. Walker's primary practice is Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California. Dr. Walker is also affiliated with Oakland Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Walker to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Christopher Adam Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Addiction Medicine & Recovery Services at Oakland Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christopher Adam Walker is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Walker is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Walker's licenses on file in 3 states: California, Washington and Ohio.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Washington license
- Ohio license
Emergency medicine physicians near Dr. Walker
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Christopher Adam Walker billed Medicare for 49 services in 2024
CMS data shows 49 Medicare services from Dr. Walker across 2 procedure codes in 2024, for 38 Medicare patients. Medicare paid $6,484 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 182024: 49172%
Dr. Walker compared with the California median for emergency medicine physicians, 2024
- Dr. Walker
- California median
- Medicare services
- 49vs 26582% below
- Medicare patients
- 38vs 24384% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Walker's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Walker?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Walker and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christopher Adam Walker treated 38 Medicare patients in 2024, average age 73
CMS counts 38 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 20 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 63% are also on Medicaid. Their average risk score is 3.07, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 66, with 45% women.
Dr. Walker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Walker's Medicare patients by sex, 2024
- Women2053%
- Men1847%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Heart failure61%
- Atrial fibrillation53%
- Diabetes53%
- Chronic kidney disease50%
- Stroke or TIA50%
- Ischemic heart disease47%
Share of Medicare patients with each condition. A patient can have several.
Dr. Walker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Christopher Adam Walker takes part in Medicare
Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Christopher Adam Walker received $34 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Walker from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Ethicon Inc. paid the most, $34.
Companies that paid Dr. Walker the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christopher Adam Walker graduated from Cleveland Medical College, Homeopathic
Dr. Walker graduated from Cleveland Medical College, Homeopathic in 2007.
- Medical school
- Board certified in emergency medicine
- Board certified in internal medicine-critical care medicine
Source: Dmand AI Professional Profile Data
Dr. Christopher Adam Walker accepts plans from 2 insurance carriers
Dr. Walker is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Walker accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Christopher Adam Walker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Christopher Adam Walker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Christopher Adam Walker's NPI number?
Dr. Christopher Adam Walker's NPI number is 1649469701. It was assigned on October 15, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher Adam Walker?
Dr. Christopher Adam Walker is an emergency medicine physician in Oakland, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Christopher Adam Walker practice?
Dr. Walker practices at 380 West MacArthur Boulevard, Oakland, CA 94609. Dr. Walker's primary practice is Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California. Dmand AI also links Dr. Walker to 1 group practice or clinic and 1 medical group.
What is Dr. Christopher Adam Walker's office phone number?
The practice phone on file for Dr. Walker is (510) 251-0121.
What is Dr. Christopher Adam Walker's medical license number?
Dr. Walker holds California license A106362, one of the licenses on file in 3 states.
Which states has Dr. Christopher Adam Walker been licensed in?
Dmand AI has state licenses on file for Dr. Walker in California (2008 to 2026), Washington (2021 to 2022) and Ohio (2007 to 2008).
Which hospitals is Dr. Christopher Adam Walker affiliated with?
Dr. Walker is affiliated with Oakland Medical Center.
What medical group is Dr. Christopher Adam Walker part of?
Dr. Walker is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Walker to 1 more medical group.
Does Dr. Christopher Adam Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 49 services in 2024, and Dr. Walker accepts Medicare assignment.
How many Medicare patients does Dr. Christopher Adam Walker see?
CMS counts 38 Medicare patients who saw Dr. Walker in 2024, with an average age of 73.
Show 6 more questionsShow fewer questions
Is Dr. Christopher Adam Walker board certified?
Yes. Dr. Walker is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Christopher Adam Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were critical care (99291) and hospital inpatient care (99232).
Where did Dr. Christopher Adam Walker go to medical school?
Dr. Walker graduated from Cleveland Medical College, Homeopathic in 2007.
Has Dr. Christopher Adam Walker received payments from drug or device companies?
CMS Open Payments shows $34 in general payments to Dr. Walker from 1 company from 2025 to 2025. The largest total came from Ethicon Inc.
How long has Dr. Christopher Adam Walker been practicing?
Dr. Walker graduated from medical school in 2007, 19 years ago.
What insurance does Dr. Christopher Adam Walker accept?
Dr. Walker is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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