Payer Directory

How to check Medicare District of Columbia Part A eligibility

A portal or phone check takes a front-desk staffer 10–15 minutes per patient. A real-time 270/271 check returns plan status, copays, deductibles, and out-of-pocket maximums in seconds.

Payer ID 12301Real-time 270/271Enrollment required · hoursMedicare

Three ways to verify Medicare District of Columbia Part A coverage

Payer portal — free, but one patient at a time and 10–15 minutes each with logins.
Phone (IVR) — hold times vary; no written record for the chart.
Automated 270/271 check — full benefit detail in seconds, batched for the whole schedule, from $0.50 per check.

Medicare District of Columbia Part A at a glance

What billers need before running a check.

Payer ID

12301

Also known as IMDC0, IMMD0

Real-time eligibility

After enrollment

A one-time enrollment is required before checks can run (about hours).

Coverage

medical

Medicare

Operating area

District of Columbia

Payer website

www.cms.gov

Supported transactions

What can be exchanged electronically with Medicare District of Columbia Part A today.

Transaction	Status
Eligibility (270/271) Real-time benefit and coverage checks	ENROLLMENT REQUIRED
Claim status (276/277) Where a submitted claim stands	NOT AVAILABLE
Professional claims (837P) Physician and outpatient claims	NOT AVAILABLE
Institutional claims (837I) Facility claims	ENROLLMENT REQUIRED
Dental claims (837D) Dental claims	NOT AVAILABLE
Remittance (835 ERA) Electronic remittance advice	ENROLLMENT REQUIRED
Coordination of benefits Secondary-payer routing	NOT AVAILABLE
Claim attachments (275) Supporting documentation	NOT AVAILABLE

Portal vs. phone vs. automated

The same verification, three ways.

	Payer portal	Phone / IVR	Automated check
Time per patient	10–15 min	15–30 min	Seconds
Cost per check	~$6.72 staff time*	~$6.72+ staff time*	from $0.50
Record for the chart	Screenshot	None	Full audit trail
Whole-day schedule	One at a time	One at a time	Batched overnight

*CAQH Index benchmark for a manual eligibility verification.

Frequently asked questions

What is the payer ID for Medicare District of Columbia Part A?+

Medicare District of Columbia Part A uses payer ID 12301. It also appears as IMDC0, IMMD0 in some systems.

Does Medicare District of Columbia Part A support real-time eligibility verification?+

Yes. Medicare District of Columbia Part A supports real-time 270/271 eligibility checks after a one-time enrollment that typically takes hours. Once enrolled, checks return in seconds.

How long does a Medicare District of Columbia Part A eligibility check take?+

A portal check takes 10–15 minutes of staff time per patient. An automated real-time check returns in seconds and can run for an entire day's schedule overnight.