James Brad Diestelhorst, M.D.
Pulmonary Disease Physician · Bellingham, WA
James Brad Diestelhorst, M.D. is a pulmonary disease physician with a practice address in Bellingham, Washington, and NPI 1336148766, issued on Jul 18, 2005. Check the license (Washington MD00041071, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- James Brad Diestelhorst
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- MD00041071 WA
Self-reported in NPPES; status is on the state search - Practice location
- 4545 Cordata Pkwy, Bellingham, WA 98226
- Phone
- (360) 738-2200
- Enumerated
- Jul 18, 2005
- Record last updated
- Sep 22, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (360) 752-5687
- Medicaid ID
- 1336148766 WA
- Medicare enrollment
- Enrolled (PECOS I20050425000543); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 324 in Washington → Look up another NPI →
Also registered at 4545 Cordata Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Steven Ban, M.D.Pediatrics Physician1932105129
- James Beieler, D.O.Family Medicine Physician1154377224
- Donald Berry, M.D.Pulmonary Disease Physician1578569927
- Nancy Bischoff, M.D.Pediatrics Physician1114926532
Verify James Brad Diestelhorst in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00041071Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
1,129 Medicare Part D claims for 313 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Albuterol Sulfate Hfa149 claims
- Arnuity Ellipta70 claims
- Fluticasone-Salmeterol56 claims
- Ambrisentan51 claims
- Spiriva Handihaler45 claims
- Trelegy Ellipta45 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.
Industry payments in 2024: $38.86
1 payment: food and beverage; the largest payer was Genzyme Corporation. The 8,806 providers of this specialty with any payment received $5,159.88 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.
Bills Medicare through one group practice
- PeacehealthBellingham, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Brad Diestelhorst among 324 pulmonary disease physician records in Washington
James Brad Diestelhorst, M.D. is one of 324 pulmonary disease physician records with a practice address in Washington. 80% 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, 92% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1996 · median 2003 among the 229 with a school on file
- Record last updated2010 · 72% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Washington
There are 324 pulmonary disease physician records in Washington.
All 324 in Washington → Every provider in Bellingham → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Donald Berry, M.D.Bellingham, WA 982261578569927
- Janet Seltzer, M.D.Bellingham, WA 982261184620536
- Ali Al-Hilli, M.D., MSC, FACPBellingham, WA 982251669888269
- Alison Beer, M.D.Bellingham, WA 982251326243387
- Gur Raj Deol, M.D.Bellingham, WA 982251588862924
- Amir Gharaei, M.D.Bellingham, WA 982251063638773
- Colleen Overdorf, DOBellingham, WA 982251013174432
- Roman Reznik, MDBellingham, WA 982251841432655
Common questions
What is James Brad Diestelhorst, M.D.'s NPI number?
James Brad Diestelhorst, M.D.'s National Provider Identifier (NPI) is 1336148766, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James Brad Diestelhorst, M.D. located?
The NPPES record lists a practice address at 4545 Cordata Pkwy, Bellingham, WA, 98226. Phone: (360) 738-2200. Providers update this record themselves, so call before visiting.
How can I verify James Brad Diestelhorst, M.D.'s license?
NPPES lists Washington license number MD00041071, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Brad Diestelhorst, M.D. prescribe under Medicare Part D?
In 2024, James Brad Diestelhorst, M.D. had 1,129 Medicare Part D claims for 313 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
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.