Katherine Lynn Walker, M.D.
Family Medicine Physician · Niwot, CO
Katherine Lynn Walker, M.D. is a family medicine physician with a practice address in Niwot, Colorado, and NPI 1184622888, issued on Jul 7, 2005. Check the license (Colorado 40593, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Lynn Walker
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 40593 CO
Self-reported in NPPES; status is on the state search - Practice location
- 6800 79TH St, Niwot, CO 80503
- Phone
- (720) 494-7100
- Enumerated
- Jul 7, 2005
- Record last updated
- Jul 22, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (303) 652-0518
- Medicaid ID
- 86286773 CO
- Medicare enrollment
- Enrolled (PECOS I20040413000184); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Verify Katherine Lynn Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 40593Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average family medicine physician in 2024
619 Medicare Part D claims for 64 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Levothyroxine Sodium58 claims
- Amlodipine Besylate41 claims
- Atorvastatin Calcium31 claims
- Hydrochlorothiazide22 claims
- Losartan Potassium21 claims
- Lisinopril20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $38.97
2 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Boulder Community HealthBoulder, CO · Acute Care Hospitals4 of 5 stars
- Catholic Health Initiatives ColoradoWestminster, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Katherine Lynn Walker among 3,563 family medicine physician records in Colorado
Katherine Lynn Walker, M.D. is one of 3,563 family medicine physician records with a practice address in Colorado. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1994 · median 2008 among the 2,077 with a school on file
- Record last updated2008 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 family medicine physician record lists a practice address in Niwot
They are 1 of the 64 NPPES records with a practice address in Niwot, and 3,563 family medicine physician records in Colorado.
All 3,563 in Colorado → Every provider in Niwot → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Anjoli Dixit, MDLongmont, CO 805031144554692
- Liliana Gomez-Medley, MDLongmont, CO 805031992945257
- Jill Murphey, MDLongmont, CO 805031962403782
- Egor PakhomovLongmont, CO 805031184588873
- Suzanne Parsons, M.D.Longmont, CO 805031841266293
- Fabio Pivetta, DOLongmont, CO 805031023226503
- Alison Railsback, MDLongmont, CO 805031043281777
- Franklin Thom, MDLongmont, CO 805031013044064
Common questions
What is Katherine Lynn Walker, M.D.'s NPI number?
Katherine Lynn Walker, M.D.'s National Provider Identifier (NPI) is 1184622888, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Lynn Walker, M.D. located?
The NPPES record lists a practice address at 6800 79TH St, Niwot, CO, 80503. Phone: (720) 494-7100. Providers update this record themselves, so call before visiting.
How can I verify Katherine Lynn Walker, M.D.'s license?
NPPES lists Colorado license number 40593, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Lynn Walker, M.D. prescribe under Medicare Part D?
In 2024, Katherine Lynn Walker, M.D. had 619 Medicare Part D claims for 64 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Katherine Lynn Walker, M.D.'s MIPS final score?
The 2023 MIPS final score is 88.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.