Maxwell Johannes Diddams, MD
Pulmonary Disease Physician · Concord, NC
Maxwell Johannes Diddams, MD is a pulmonary disease physician with a practice address in Concord, North Carolina, and NPI 1740716000, issued on May 5, 2017. Check the license (North Carolina 2021-00610, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Maxwell Johannes Diddams
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License numbers
- 2021-00610 NC
227243 NC
Self-reported in NPPES; status is on the state search - Practice location
- 1090 NE Gateway CT NE Ste 201, Concord, NC 28025
- Phone
- (704) 403-7770
- Enumerated
- May 5, 2017
- Record last updated
- Jul 4, 2024
- Fax
- (704) 403-7779
- Medicare enrollment
- Enrolled (PECOS I20211111001949); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 429 in North Carolina → Look up another NPI →
Also registered at 1090 NE Gateway CT NE Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Molly McCabePhysician Assistant1982427266
Verify Maxwell Johannes Diddams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 2021-00610Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
140 Medicare Part D claims for 54 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Trelegy Ellipta24 claims
- Prednisone17 claims
- Albuterol Sulfate Hfa13 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: $415.23
5 payments; by number, the most common kind was food and beverage; the largest payer was Pulmonx 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
- The Charlotte-Mecklenburg Hospital AuthorityConcord, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maxwell Johannes Diddams among 429 pulmonary disease physician records in North Carolina
Maxwell Johannes Diddams, MD is one of 429 pulmonary disease physician records with a practice address in North Carolina. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 91% of them.
- NPI issued2017 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2017 · median 2001 among the 333 with a school on file
- Record last updated2024 · 51% 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 North Carolina 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 North Carolina
There are 429 pulmonary disease physician records in North Carolina.
All 429 in North Carolina → Every provider in Concord → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Osmund Agbo, M.DConcord, NC 280251275728529
- Iyad Asaad, MDConcord, NC 280251881809994
- Patrick Kelly, MDConcord, NC 280251063474419
- Jeffrey Marchant, MDConcord, NC 280251336102300
- Blake Spain, MDConcord, NC 280251952416331
- Chau Taylor, MDConcord, NC 280251639335169
- Nehal Thakkar, MDConcord, NC 280251194772368
- Prag Gupta, MDDenver, NC 280371801879911
Common questions
What is Maxwell Johannes Diddams, MD's NPI number?
Maxwell Johannes Diddams, MD's National Provider Identifier (NPI) is 1740716000, issued on May 5, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Maxwell Johannes Diddams, MD located?
The NPPES record lists a practice address at 1090 NE Gateway CT NE Ste 201, Concord, NC, 28025. Phone: (704) 403-7770. Providers update this record themselves, so call before visiting.
How can I verify Maxwell Johannes Diddams, MD's license?
NPPES lists North Carolina license number 2021-00610, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maxwell Johannes Diddams, MD prescribe under Medicare Part D?
In 2024, Maxwell Johannes Diddams, MD had 140 Medicare Part D claims for 54 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.