Dr. Kolby Walker, DO
- Medicare services, 2024
- 169
- Medicare patients, 2024
- 63
- Part D claims, 2024
- 1,903
- MIPS score, 2024
- 91
- Hospital affiliations
- 4
- Practice address
- 12401 Washington Blvd, Whittier, CA 90602
- Practice phone
- Call (562) 698-0811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Kolby Walker is a psychiatrist in Whittier, California
Dr. Walker practices at PIH Health Whittier Hospital in Whittier, California, part of PIH Health.
Dr. Walker's NPI, 1144541376, was assigned on June 22, 2010. Dr. Walker holds Oregon license PG151476.
- NPI
- 1144541376NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264679711
- NPI enumeration date
- June 22, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (562) 698-0811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kolby Walker practices at PIH Health Whittier Hospital in Whittier, California
Dr. Walker's primary practice is PIH Health Whittier Hospital, at 12401 Washington Blvd, Whittier, CA 90602 in Los Angeles County. The practice phone is (562) 698-0811.
- PIH Health Whittier Hospital12401 Washington Blvd, Whittier, CA 90602 · Los Angeles CountyPhone(562) 698-0811
Source: Dmand AI Affiliation Data
Dr. Kolby Walker is affiliated with 6 sites of care and 8 medical groups
Dr. Walker's primary practice is PIH Health Whittier Hospital in Whittier, California, part of PIH Health. Dr. Walker is also affiliated with Adventist Health and Rideout. The medical group on file is Mid-Columbia Center for Living. Dmand AI also links Dr. Walker to 2 more hospitals, 7 medical groups and 2 group practices and clinics, 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. Kolby Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| PIH Health Whittier Hospital | Available with a free account |
| +5 more sites and 7 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kolby Walker is one of 6,803 psychiatrists in California
Psychiatry is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Walker's licenses on file in 3 states: Oregon, California and Nevada.
Specialties and state licenses
- Psychiatry, OregonPrimary
- California license
- Nevada license
Psychiatrists near Dr. Walker
Counts of psychiatrists 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. Kolby Walker billed Medicare for 169 services in 2024
CMS data shows 169 Medicare services from Dr. Walker across 1 procedure code in 2024, all of them office visits, for 63 Medicare patients. Medicare paid $11,622 for them. Every service was in an office.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1152024: 16947%
Dr. Walker compared with the California median for psychiatrists, 2024
- Dr. Walker
- California median
- Medicare services
- 169vs 11942% above
- Medicare patients
- 63vs 4154% above
- Part D claims
- 1,782vs 14412.4 times
Medians across 6,809 psychiatrists 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kolby Walker treated 63 Medicare patients in 2024, average age 58
CMS counts 63 Medicare patients who saw Dr. Walker in 2024. The largest group is under 65, with 33 patients. 70% of them have mood disorders, and 62% have high blood pressure. 81% are also on Medicaid. Their average risk score is 1.56, 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 43, with 44% 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
- Women3149%
- Men3251%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- Mood disorders70%
- High blood pressure62%
- Anxiety60%
- High cholesterol59%
- Schizophrenia and other psychoses54%
- Depression51%
- Alcohol and drug use disorders49%
- Bipolar disorder49%
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 43
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kolby Walker wrote 1,903 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 1,903 Medicare Part D claims for 78 patients. 92% of them were for generic drugs. CMS names the drug for 1,782 of them, across 45 drugs with 11 or more claims each, at $460,421 in total drug cost. In 2023, CMS named 1,755 claims across 41 drugs.
Dr. Walker's Part D claims by kind of drug, 2024
- Generic1,752 claims92%
- Brand-name151 claims8%
Dr. Walker's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Walker's Part D claims, 2024
- Antipsychotics, patients 65 and over10%194 of 1,903 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,7552024: 1,7822%
Drugs named by CMS: 45 in 2024, 41 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Kolby Walker scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Walker for performance year 2024, reported as part of a group. Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Walker as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Walker's MIPS scores, performance year 2024
- 91of 100Final score
- 83.3of 100Quality
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for Dr. Kolby 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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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. Kolby 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. Kolby Walker's NPI number?
Dr. Kolby Walker's NPI number is 1144541376. It was assigned on June 22, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Kolby Walker?
Dr. Kolby Walker is a psychiatrist in Whittier, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Kolby Walker practice?
Dr. Walker practices at 12401 Washington Blvd, Whittier, CA 90602. Dr. Walker's primary practice is PIH Health Whittier Hospital in Whittier, California, part of PIH Health. Dmand AI also links Dr. Walker to 2 hospitals, 7 medical groups and 2 group practices and clinics.
What is Dr. Kolby Walker's office phone number?
The practice phone on file for Dr. Walker is (562) 698-0811.
What is Dr. Kolby Walker's medical license number?
Dr. Walker holds Oregon license PG151476, one of the licenses on file in 3 states.
Which states has Dr. Kolby Walker been licensed in?
Dmand AI has state licenses on file for Dr. Walker in Oregon, California and Nevada.
Which hospitals is Dr. Kolby Walker affiliated with?
Dr. Walker practices at PIH Health Whittier Hospital in Whittier, California. Dr. Walker is also affiliated with Adventist Health and Rideout. Dmand AI links Dr. Walker to 2 more hospitals.
What medical group is Dr. Kolby Walker part of?
Dr. Walker is linked to Mid-Columbia Center for Living. Dmand AI links Dr. Walker to 7 more medical groups.
Does Dr. Kolby Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 169 services in 2024, and Dr. Walker accepts Medicare assignment.
Does Dr. Kolby Walker offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Walker as offering telehealth services.
Show 5 more questionsShow fewer questions
What is Dr. Kolby Walker's MIPS score?
Dr. Walker's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Kolby Walker see?
CMS counts 63 Medicare patients who saw Dr. Walker in 2024, with an average age of 58.
What services does Dr. Kolby Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were office visit, established patient (99214).
What drugs does Dr. Kolby Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Lamotrigine, Olanzapine and Trazodone HCl.
How long has Dr. Kolby Walker been practicing?
Dr. Walker graduated from medical school in 2010, 16 years ago.
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