DR. C. MARK ALDER MD
NPI 1386631927
Radiology - Diagnostic Radiology in Spokane, WA

Active since September 29, 2005PECOS EnrolledAccepts Medicare Assignment
801 S STEVENS ST, SPOKANE, WA 99204(509) 363-7788(509) 363-7064 Get Directions Write a Review

NPPES record last updated: September 26, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 26, 2019, May 2, 2018 (2 updates tracked since 2018).

About Dr. C. Mark Alder Md NPPES

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

DR. C. MARK ALDER MD (NPI 1386631927) is an individual diagnostic radiology provider in Spokane, Washington, licensed in Washington (MD60971889) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Samaritan Hospital, and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (1995).

NPPES Registry Identity

NPI1386631927
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameDR. C. MARK ALDERCredential: MD
Location Address801 S STEVENS STSpokane, WA 99204-2654
Mailing Address801 S Stevens StSpokane, WA 99204-2654 · (509) 363-7788 · Fax (509) 363-7064
Fax(509) 363-7064
Sole ProprietorNo
Medical School CMSUniversity Of Kansas School Of Med (kc/wich/sal)Graduated 1995
Enumeration DateSeptember 29, 2005
Last NPPES UpdateSeptember 26, 20192 updates tracked since enumeration
✔ NPI 1386631927 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in WA · MD60971889
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
801 S STEVENS ST, Spokane, WA 99204

Other Identifiers 1

Medicaid1386631927WA

Accepted 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. C. Mark Alder 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 ID1254314222
PECOS Enrollment IDI20191004001267, I20191004001585
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

8

Medicare enrollment records show C. Alder reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Diagnostic Radiology
801 S STEVENS ST
Spokane, WA 99204
  • Reassigned Medicare billing, Montana and Washington enrollments
  • 130 clinicians in this Medicare group
Diagnostic Radiology
525 S COWLEY ST
Spokane, WA 99202
  • Reassigned Medicare billing, Montana and Washington enrollments
  • 120 clinicians in this Medicare group
Federally Qualified Health Center (FQHC)
605 S COOLIDGE ST
Moses Lake, WA 98837
  • Reassigned Medicare billing, Washington enrollment
  • 134 clinicians in this Medicare group
Critical Access
1012 SOUTH THIRD STREET
Dayton, WA 99328
  • Reassigned Medicare billing, Washington enrollment
  • 141 clinicians in this Medicare group
Emergency Medical Services
200 NAT WASHINGTON WAY
Ephrata, WA 98823
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: Grant County Public Hospital District No. 3
  • 144 clinicians in this Medicare group
Critical Access
507 HOSPITAL WAY
Brewster, WA 98812
  • Reassigned Medicare billing, Washington enrollment
  • 238 clinicians in this Medicare group
Emergency Medical Services
908 10TH AVE SW
Quincy, WA 98848
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: Grant County Hospital District No. 2
  • 141 clinicians in this Medicare group
Diagnostic Radiology
1200 12TH AVE S
Seattle, WA 98144
  • Reassigned Medicare billing, Montana and Washington enrollments
  • 129 clinicians in this Medicare group

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 26

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.

Injection, gadobutrol, 0.1 ml A9585
Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.
1,675 services21 patients
Screening 3d breast mammography 77063
Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.
551 services551 patients
Screening mammography 77067
Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.
551 services551 patients
Dxa bone density measurement of hip, pelvis, spine 77080
A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.
370 services370 patients
Screening mammography 77067
Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.
350 services350 patients
Screening 3d breast mammography 77063
Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.
332 services332 patients

Hospital Affiliations CMS Care Compare 5

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

Samaritan Hospital

Acute Care Hospitals · Moses Lake, WA
4/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number500033
Location801 East Wheeler RoadMoses Lake, WA 98837 · Grant County
Emergency services Birthing friendly

Lincoln Hospital

Critical Access Hospitals · Davenport, WA
OwnershipGovernment - Hospital District or Authority
CMS Certification Number501305
Location10 Nichols StreetDavenport, WA 99122 · Lincoln County
Emergency services

Newport Community Hospital

Critical Access Hospitals · Newport, WA
OwnershipGovernment - Hospital District or Authority
CMS Certification Number501310
Location714 West Pine StreetNewport, WA 99156 · Pend Oreille County
Emergency services

Providence Mount Carmel Hospital

Critical Access Hospitals · Colville, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number501326
Location982 East ColumbiaColville, WA 99114 · Stevens County
Emergency services Birthing friendly

Pullman Regional Hospital

Critical Access Hospitals · Pullman, WA
5/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number501331
Location835 S Bishop BlvdPullman, WA 99163 · Whitman County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 99204 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
$88.29 typical visit price
range $57.27 – $172.80
Typical copayment $22.07 (range $14.31 – $43.20)
Most-billed visit code 99203
Established Patient
$71.29 typical visit price
range $18.56 – $141.11
Typical copayment $17.82 (range $4.64 – $35.27)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

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

Radiology (Diagnostic Radiology)
801 S STEVENS ST
SPOKANE, WA 99204
Radiology (Diagnostic Radiology)
801 S STEVENS ST
SPOKANE, WA 99204
Radiology (Diagnostic Radiology)
801 S STEVENS ST
SPOKANE, WA 99204
Radiology (Vascular & Interventional Radiology)
801 S STEVENS ST
SPOKANE, WA 99204
Nurse Practitioner (Adult Health)
801 S STEVENS ST
SPOKANE, WA 99204
Radiology (Diagnostic Radiology)
801 S STEVENS ST
SPOKANE, WA 99204
Radiology (Diagnostic Radiology)
801 S STEVENS ST
SPOKANE, WA 99204
Radiology (Diagnostic Radiology)
801 S STEVENS ST
SPOKANE, WA 99204

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 C. Alder's NPI number?

The NPI number for C. Alder is 1386631927. It was assigned to this individual provider in the NPPES registry on September 29, 2005.

Where is C. Alder located?

C. Alder practices at 801 S Stevens St, Spokane, WA 99204. The listed phone number is (509) 363-7788.

What is C. Alder's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is C. Alder enrolled in Medicare?

Yes. C. Alder 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 C. Alder's services?

According to the CMS Revalidation Reassignment List (October 2026 release), C. Alder reassigns Medicare benefits to 8 organizations: Integra Imaging, Ps (Spokane, WA), Inland Imaging LLC (Spokane, WA), Moses Lake Community Health Center (Moses Lake, WA), Columbia County Hospital District (Dayton, WA), Grant County Public Hospital District 3 (Ephrata, WA) and 3 more organizations, listed in the Medicare section above. 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 C. Alder's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does C. Alder accept?

Health plans from Blue Cross and Blue Shield of Montana list C. Alder 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 C. Alder affiliated with any hospitals?

According to CMS data, C. Alder is affiliated with Samaritan Hospital, Lincoln Hospital, Newport Community Hospital, Providence Mount Carmel Hospital and Pullman Regional Hospital.

When was this NPI record last updated?

The NPPES record for C. Alder was last updated on September 26, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.