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MARY T RIGGS DO
NPI 1285799627
Obstetrics & Gynecology in Crystal Lake, IL

Active since December 26, 2006PECOS EnrolledAccepts Medicare Assignment
750 E TERRA COTTA AVE STE B, CRYSTAL LAKE, IL 60014(815) 356-2323(815) 455-8130 Get Directions Write a Review

NPPES record last updated: September 3, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mary T Riggs Do NPPES

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

MARY T RIGGS DO (NPI 1285799627) is an individual obstetrics & gynecology provider in Crystal Lake, Illinois, licensed in Illinois (036-092162) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS and is a graduate of Midwestern University, Chicago College Of Osteopathic Med (1993).

NPPES Registry Identity

NPI1285799627
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMARY T RIGGSCredential: DO
Location Address750 E TERRA COTTA AVE STE BCrystal Lake, IL 60014-3621
Mailing Address750 E Terra Cotta Ave Ste BCrystal Lake, IL 60014-3621 · (815) 356-2323 · Fax (815) 455-8130
Phone(815) 356-2323
Fax(815) 455-8130
Sole ProprietorNo
Medical School CMSMidwestern University, Chicago College Of Osteopathic MedGraduated 1993
Enumeration DateDecember 26, 2006
Last NPPES UpdateSeptember 3, 2020
NPPES CertifiedSeptember 3, 2020
✔ NPI 1285799627 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in IL · 036-092162
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
750 E TERRA COTTA AVE STE B, Crystal Lake, IL 60014
Open in Google Maps ↗

Other Identifiers 1

Medicaid036092162 1IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Wellmark Health Plan of Iowa, Inc..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

Mary T Riggs Do 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 ID4880684760
PECOS Enrollment IDI20100612000103
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

6

Medicare enrollment records show Mary Riggs reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Central Dupage Physician Group
30 mi
Family Medicine
5777 DEPARTMENT
Carol Stream, IL 60122
  • Reassigned Medicare billing, Illinois enrollment
  • 1,664 clinicians in this Medicare group
NPI 1033149844 (630) 933-3300
Mercy Health System Corporation
48 mi
Multi-Specialty
580 N WASHINGTON ST
Janesville, WI 53548
  • Reassigned Medicare billing, Illinois enrollment
  • 671 clinicians in this Medicare group
NPI 1598718603 (608) 741-7630
Freeport Regional Health Care Foundation
68 mi
Family Medicine
1036 W STEPHENSON ST
Freeport, IL 61032
  • Reassigned Medicare billing, Illinois enrollment
  • 391 clinicians in this Medicare group
NPI 1457337016 (815) 599-6000
Freeport Memorial Hospital
68 mi
General Acute Care Hospital
1045 W STEPHENSON ST
Freeport, IL 61032
  • Reassigned Medicare billing, Illinois enrollment
  • 478 clinicians in this Medicare group
NPI 1447228788 (815) 599-6000
Genesis Health System
126 mi
Anatomic Pathology & Clinical Pathology
1227 E RUSHOLME ST
Davenport, IA 52803
  • Reassigned Medicare billing, Illinois enrollment
  • 143 clinicians in this Medicare group
NPI 1295196798 (563) 355-9200
Crawford Hospital District
225 mi
Critical Access
1000 N ALLEN ST
Robinson, IL 62454
  • Reassigned Medicare billing, Illinois enrollment
  • 116 clinicians in this Medicare group
NPI 1265493720 (618) 544-3131

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

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.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60014 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
$127.46 typical visit price
range $54.80 – $168.44
Typical copayment $31.86 (range $13.70 – $42.11)
Most-billed visit code 99204
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.

Other Providers at the Same Location NPPES 3

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

CHRISTINE C HEPPERLEN NP
Nurse Practitioner
750 E TERRA COTTA AVE STE B
CRYSTAL LAKE, IL 60014
McHenry County (815) 356-2323
TUCKER D BENJAMIN MS, PA-C
Physician Assistant
750 E TERRA COTTA AVE STE B
CRYSTAL LAKE, IL 60014
McHenry County (815) 759-6363
ANGELA L MICIURA MD
Surgery
750 E TERRA COTTA AVE STE B
CRYSTAL LAKE, IL 60014
McHenry County (815) 759-6363

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 Mary Riggs's NPI number?

The NPI number for Mary Riggs is 1285799627. It was assigned to this individual provider in the NPPES registry on December 26, 2006.

Where is Mary Riggs located?

Mary Riggs practices at 750 E Terra Cotta Ave Ste B, Crystal Lake, IL 60014. The listed phone number is (815) 356-2323.

What is Mary Riggs's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Mary Riggs enrolled in Medicare?

Yes. Mary Riggs 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 Mary Riggs's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Riggs reassigns Medicare benefits to 6 organizations: Central Dupage Physician Group (Carol Stream, IL), Mercy Health System Corporation (Janesville, WI), Freeport Regional Health Care Foundation (Freeport, IL), Freeport Memorial Hospital (Freeport, IL), Genesis Health System (Davenport, IA) and 1 more organization, 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 Mary Riggs's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Riggs accept?

Health plans from Wellmark Health Plan of Iowa, Inc. list Mary Riggs 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.

When was this NPI record last updated?

The NPPES record for Mary Riggs was last updated on September 3, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.