NPPES file of Aug 9, 2026

Peter Laurence Castro, M.D.

Anesthesiology Physician · Boulder, CO

Peter Laurence Castro, M.D. is an anesthesiology physician with a practice address in Boulder, Colorado, and NPI 1316986581, issued on Jun 5, 2006. Check the license (Colorado 44534, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1316986581
Name
Peter Laurence Castro
Credential
M.D.
Primary taxonomy
Anesthesiology Physician 207L00000X
License numbers
44534 CO
R5985 TX
Self-reported in NPPES; status is on the state search
Practice location
1100 Balsam Ave, Boulder, CO 80304
Phone
(303) 422-9438
Enumerated
Jun 5, 2006
Record last updated
Aug 16, 2023
Fax
(303) 422-9474
Medicare enrollment
Enrolled (PECOS I20060831000411); accepts Medicare assignment
Medical or professional school
Vanderbilt University School Of Medicine, 2002
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest anesthesiology physician records → All 1,202 in Colorado → Look up another NPI →

Also registered at 1100 Balsam Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Brooke Alt, M.D.Anatomic Pathology & Clinical Pathology Physician1326008871
  2. Jose Angel, MDAnesthesiology Physician1972543254
  3. David BennerPhysician Assistant1538150966
  4. Charles Bowles, M.D.Diagnostic Radiology Physician1417922105
  5. Martha CabeenEmergency Medicine Physician1043295306
  6. Richard Caffrey, MDAnesthesiology Physician1144270562

Verify Peter Laurence Castro in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersColorado Medical Board
    Search for license 44534    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Colorado license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 2 group practices

  1. Caw Anesthesia PLLCLongmont, CO
  2. Performa Physical Medicine And WellnessHeath, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Peter Laurence Castro among 1,202 anesthesiology physician records in Colorado

Peter Laurence Castro, M.D. is one of 1,202 anesthesiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.

  • NPI issued2006 · 13% of these records are older, 54% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2002 · median 2006 among the 824 with a school on file
  • Record last updated2023 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Anesthesiology Physician providers in Colorado

There are 1,202 anesthesiology physician records in Colorado.

All 1,202 in Colorado → Every provider in Boulder → Anesthesiology Physician nationwide →

The 8 anesthesiology physician records with the nearest ZIP codes

  1. Jose Angel, MDBoulder, CO 803041972543254
  2. Richard Caffrey, MDBoulder, CO 803041144270562
  3. Thomas Chalmers, MDBoulder, CO 803041407807423
  4. Avninder Dhaliwal, MDBoulder, CO 803041982630497
  5. Richard Gildersleeve, MDBoulder, CO 803041023044369
  6. John Harrison, M.D.Boulder, CO 803041093706723
  7. Anthony Hillenbrand, DOBoulder, CO 803041982630521
  8. Stephen Layne, MDBoulder, CO 803041265461651

Common questions

What is Peter Laurence Castro, M.D.'s NPI number?

Peter Laurence Castro, M.D.'s National Provider Identifier (NPI) is 1316986581, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Peter Laurence Castro, M.D. located?

The NPPES record lists a practice address at 1100 Balsam Ave, Boulder, CO, 80304. Phone: (303) 422-9438. Providers update this record themselves, so call before visiting.

How can I verify Peter Laurence Castro, M.D.'s license?

NPPES lists Colorado license number 44534, 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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.