1. Home
  2. Directory
  3. Illinois
  4. Champaign
  5. Psychiatry Neurology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ALEXANDER DIAZ SEGER MD
NPI 1457913279
Psychiatry & Neurology - Psychiatry in Champaign, IL

Active since July 01, 2019PECOS EnrolledAccepts Medicare Assignment
206 N RANDOLPH ST OFC 246, CHAMPAIGN, IL 61820(833) 351-8255 Get Directions Write a Review

NPPES record last updated: August 10, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 10, 2026, Oct 13, 2023, Mar 31, 2023 and 1 more (4 updates tracked since 2019).

About Alexander Diaz Seger Md NPPES

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

ALEXANDER DIAZ SEGER MD (NPI 1457913279) is an individual psychiatry provider in Champaign, Illinois, licensed in Illinois (036.165127) and active in the NPI registry since July 2019. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital -centralia, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1457913279
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameALEXANDER DIAZ SEGERCredential: MD
Location Address206 N RANDOLPH ST OFC 246Champaign, IL 61820-3949
Mailing Address206 N Randolph St Ofc 246Champaign, IL 61820-3949
Phone(833) 351-8255
Sole ProprietorNo
Medical School CMSCreighton University School Of MedicineGraduated 2019
Enumeration DateJuly 1, 2019
Last NPPES UpdateAugust 10, 20264 updates tracked since enumeration
NPPES CertifiedAugust 10, 2026
✔ NPI 1457913279 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in IL · 036.165127✔ Licensed in NE · 35426
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
206 N RANDOLPH ST OFC 246, Champaign, IL 61820
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1109 W 27th St Rm 5SNew York, NY 10001-6208 · Phone (833) 351-8255
Location 21 W Winter St Ste 200Delaware, OH 43015-4635 · Phone (833) 351-8255

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alexander Diaz Seger 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 ID1355671348
PECOS Enrollment IDI20230720002871
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.

Areas of Expertise CMS Part B claims 4

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
271 services54 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.
36 services30 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
36 services35 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
13 services13 patients

Hospital Affiliations CMS Care Compare

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

Ssm Health St Mary's Hospital -Centralia

Acute Care Hospitals · Centralia, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140034
Location400 North Pleasant AvenueCentralia, IL 62801 · Marion County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 61820 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
$168.44 typical visit price
range $54.80 – $168.44
Typical copayment $42.11 (range $13.70 – $42.11)
Most-billed visit code 99205
Established Patient
$68.64 typical visit price
range $17.16 – $136.56
Typical copayment $17.16 (range $4.29 – $34.14)
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.

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 Alexander Seger's NPI number?

The NPI number for Alexander Seger is 1457913279. It was assigned to this individual provider in the NPPES registry on July 1, 2019.

Where is Alexander Seger located?

Alexander Seger practices at 206 N Randolph St Ofc 246, Champaign, IL 61820. The listed phone number is (833) 351-8255.

What is Alexander Seger's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Alexander Seger enrolled in Medicare?

Yes. Alexander Seger 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.

Is Alexander Seger affiliated with any hospitals?

According to CMS data, Alexander Seger is affiliated with Ssm Health St Mary's Hospital -Centralia.

When was this NPI record last updated?

The NPPES record for Alexander Seger was last updated on August 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days 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.