William R. Shaffer, M.D.
Neurology Physician · Boulder, CO
William R. Shaffer, M.D. is a neurology physician with a practice address in Boulder, Colorado, and NPI 1801044722, issued on Sep 4, 2008. Check the license (Colorado DR.0047669, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- William R. Shaffer
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License numbers
- DR.0047669 CO
036.121384 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4801 Riverbend RD Ste 200, Boulder, CO 80301
- Phone
- (303) 415-8800
- Enumerated
- Sep 4, 2008
- Record last updated
- Sep 27, 2024
- Fax
- (303) 415-8801
- Medicare enrollment
- Enrolled (PECOS I20090813000338); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 396 in Colorado → Look up another NPI →
Also registered at 4801 Riverbend RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Delisa ContrerasRegistered Nurse1497676134
- Nicole Getzel, DONeurology Physician1427378090
- Matthew Kidd, D.O.Neurology Physician1417138322
- Satish Rao, M.D.Neurology Physician1265404008
- Jonathan Welker, PA-CMedical Physician Assistant1770812588
- Alan Zacharias, M.D.Neurology Physician1356385827
Verify William R. Shaffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0047669Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% more Medicare Part D claims than the average neurology physician in 2024
1,687 Medicare Part D claims for 333 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Baclofen130 claims
- Diclofenac Sodium108 claims
- Rebif Rebidose105 claims
- Lacosamide102 claims
- Verapamil Hcl81 claims
- Amitriptyline Hcl70 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 MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $39,781.15
29 payments; by number, the most common kind was food and beverage; the largest payer was Emd Serono, Inc. The 10,858 providers of this specialty with any payment received $8,318.07 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.
One hospital affiliation
- Boulder Community HealthBoulder, CO · Acute Care Hospitals4 of 5 stars
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.
William R. Shaffer among 396 neurology physician records in Colorado
William R. Shaffer, M.D. is one of 396 neurology physician records with a practice address in Colorado. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 47% of them.
- NPI issued2008 · 47% of these records are older, 48% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2004 · median 2010 among the 275 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in Colorado
There are 396 neurology physician records in Colorado.
All 396 in Colorado → Every provider in Boulder → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Nicole Getzel, DOBoulder, CO 803011427378090
- Matthew Kidd, D.O.Boulder, CO 803011417138322
- Satish Rao, M.D.Boulder, CO 803011265404008
- Alan Zacharias, M.D.Boulder, CO 803011356385827
- Jocelyn Bear, M.D.Boulder, CO 803021245422948
- Sidarth DasariBoulder, CO 803041497286421
- George Garmany, M.D.Boulder, CO 803041558302901
- Kristi Gill, D.O.Boulder, CO 803041750514261
Common questions
What is William R. Shaffer, M.D.'s NPI number?
William R. Shaffer, M.D.'s National Provider Identifier (NPI) is 1801044722, issued on Sep 4, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William R. Shaffer, M.D. located?
The NPPES record lists a practice address at 4801 Riverbend RD Ste 200, Boulder, CO, 80301. Phone: (303) 415-8800. Providers update this record themselves, so call before visiting.
How can I verify William R. Shaffer, M.D.'s license?
NPPES lists Colorado license number DR.0047669, 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 William R. Shaffer, M.D. prescribe under Medicare Part D?
In 2024, William R. Shaffer, M.D. had 1,687 Medicare Part D claims for 333 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is William R. Shaffer, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.6 of 100. 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.