James Diestelhorst, M.D.
Pulmonary Disease Physician · Bellingham, WA
James 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 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
- Entity
- Type 1 · individual
Also registered at 4545 Cordata Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Aita, M.D.Internal Medicine Physician1518956556
- Sara Andert, MDFamily Medicine Physician1538270541
- 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 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
25% 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 1,498 among the 6,594 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, mostly food and beverage; the largest payer was Genzyme Corporation. The 4,997 providers of this specialty with any payment received $4,850.73 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 or facility affiliation
- PeacehealthBellingham, WA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Pulmonary Disease Physician providers in Washington
There are 190 pulmonary disease physician records in Washington.
Other pulmonary disease physician records in Washington
- Rosemary Adamson, MB BSSeattle, WA1881853745
- Radha Agrawal, MDBellevue, WA1881629798
- Moira AitkenSeattle, WA1558446385
- Ali Al-Hilli, M.D., MSC, FACPBellingham, WA1669888269
- Bashar Alkinj, MDVancouver, WA1497986871
- William Altemeier, MDSeattle, WA1447335278
- Linda Anderson, M.D.Seattle, WA1053317222
- Benjamin Arthurs, M.D.Spokane, WA1023374113
- Engi Attia, MDSeattle, WA1407055650
- Gautam Babu, MDSeattle, WA1982233185
Common questions
What is James Diestelhorst, M.D.'s NPI number?
James 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 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 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 Diestelhorst, M.D. prescribe under Medicare Part D?
In 2024, James Diestelhorst, M.D. had 1,129 Medicare Part D claims for 313 beneficiaries; the average among pulmonary disease physician prescribers was 1,498. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.