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DR. MAXWELL JOHANNES DIDDAMS MD
NPI 1740716000
Internal Medicine - Pulmonary Disease in Concord, NC

Active since May 05, 2017PECOS EnrolledAccepts Medicare Assignment
1090 NE GATEWAY CT NE STE 201, CONCORD, NC 28025(704) 403-7770(704) 403-7779 Get Directions Write a Review

NPPES record last updated: July 4, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 4, 2024, Feb 17, 2022, Dec 1, 2021 (3 updates tracked since 2021).

About Dr. Maxwell Johannes Diddams Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MAXWELL JOHANNES DIDDAMS MD (NPI 1740716000) is an individual pulmonary disease provider in Concord, North Carolina, licensed in North Carolina (2021-00610) and active in the NPI registry since May 2017. He is enrolled in Medicare PECOS, is affiliated with Carolinas Medical Center-northeast, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1740716000
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameDR. MAXWELL JOHANNES DIDDAMSCredential: MD
Location Address1090 NE GATEWAY CT NE STE 201Concord, NC 28025-2423
Mailing Address1090 Ne Gateway Ct Ne Ste 201Concord, NC 28025-2423 · (704) 403-7770 · Fax (704) 403-7779
Phone(704) 403-7770
Fax(704) 403-7779
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateMay 5, 2017
Last NPPES UpdateJuly 4, 20243 updates tracked since enumeration
NPPES CertifiedJuly 4, 2024
✔ NPI 1740716000 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in NC · 2021-00610
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal MedicineTaxonomy 207R00000X · License 227243 (NC)
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 2021-00610 (NC)
1090 NE GATEWAY CT NE STE 201, Concord, NC 28025
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter Health, Ambetter of North Carolina and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Maxwell Johannes Diddams Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2961770631
PECOS Enrollment IDI20211111001949
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Maxwell Diddams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Carolinas Physicians Network Inc
Same address
Family Medicine
1090 NE GATEWAY CT NE, STE 202
Concord, NC 28025
  • Reassigned Medicare billing, North Carolina enrollment
  • 2,057 clinicians in this Medicare group
NPI 1902049190 (704) 403-9050
The Charlotte-Mecklenburg Hospital Authority
Same address
Orthopaedic Surgery
1090 NE GATEWAY CT NE, STE 204
Concord, NC 28025
  • Reassigned Medicare billing, North Carolina enrollment
  • 1,534 clinicians in this Medicare group
NPI 1629432281 (704) 403-7020
Carolinas Medical Center
1.4 mi
Obstetrics & Gynecology
200 MEDICAL PARK DR, STE 250
Concord, NC 28025
  • Reassigned Medicare billing, North Carolina enrollment
  • 2,223 clinicians in this Medicare group
NPI 1467790055 (704) 403-6350

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
28 services15 patients
Drainage of fluid from chest cavity with insertion of indwelling tube using imaging guidance 32557
This procedure involves removing fluid from your chest cavity, which is the space around your lungs. A small tube is inserted, under image guidance, to drain the fluid. This tube stays in place to prevent fluid buildup, aiding in your breathing and comfort.
24 services21 patients
Aspiration of fluid from chest cavity using imaging guidance 32555
This procedure, known as a thoracentesis, involves removing fluid from the space between the lungs and chest wall, called the pleural space. It's performed under imaging guidance to ensure precision. It can help diagnose conditions or relieve symptoms like shortness of breath.
20 services16 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
15 services15 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
15 services15 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
13 services13 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Carolinas Medical Center-Northeast

Acute Care Hospitals · Concord, NC
4/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number340001
Location920 Church St NConcord, NC 28025 · Cabarrus County
Emergency services Birthing friendly

Carolinas Medical Center/Behav Health

Acute Care Hospitals · Charlotte, NC
2/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number340113
Location1000 Blythe BlvdCharlotte, NC 28203 · Mecklenburg County
Emergency services Birthing friendly

Stanly Regional Medical Center

Acute Care Hospitals · Albemarle, NC
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number340119
Location301 Yadkin StAlbemarle, NC 28001 · Stanly County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 28025 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$125.01 typical visit price
range $54.12 – $165.09
Typical copayment $31.25 (range $13.53 – $41.27)
Most-billed visit code 99204
Established Patient
$95.94 typical visit price
range $17.21 – $134.61
Typical copayment $23.98 (range $4.30 – $33.65)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513
DME-Other DME · category DE000N
7 suppliers14 claims14 services$24.18 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATHRYN JOAN SCULLY
Nurse Practitioner (Acute Care)
1090 NE GATEWAY CT NE STE 201
CONCORD, NC 28025
Cabarrus County (704) 403-7770
MOLLY KAY MCCABE
Physician Assistant
1090 NE GATEWAY CT NE STE 201
CONCORD, NC 28025
Cabarrus County (704) 667-3925

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Maxwell Diddams's NPI number?

The NPI number for Maxwell Diddams is 1740716000. It was assigned to this individual provider in the NPPES registry on May 5, 2017.

Where is Maxwell Diddams located?

Maxwell Diddams practices at 1090 NE Gateway Ct NE Ste 201, Concord, NC 28025. The listed phone number is (704) 403-7770.

What is Maxwell Diddams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Maxwell Diddams enrolled in Medicare?

Yes. Maxwell Diddams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Maxwell Diddams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Maxwell Diddams reassigns Medicare benefits to 3 organizations: Carolinas Physicians Network Inc (Concord, NC), The Charlotte-Mecklenburg Hospital Authority (Concord, NC) and Carolinas Medical Center (Concord, NC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Maxwell Diddams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Maxwell Diddams accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee and Blue Cross and Blue Shield of NC and 1 other insurer list Maxwell Diddams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Maxwell Diddams affiliated with any hospitals?

According to CMS data, Maxwell Diddams is affiliated with Carolinas Medical Center-Northeast, Carolinas Medical Center/Behav Health and Stanly Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Maxwell Diddams was last updated on July 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.