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DR. MARICHU THERESA A. MATAS M.D.
NPI 1558526228
Internal Medicine in Rockville, MD

Active since July 22, 2008PECOS EnrolledAccepts Medicare Assignment
10110 MOLECULAR DRIVE, SUITE 206, ROCKVILLE, MD 20850(301) 279-2779(240) 403-0190 Get Directions Write a Review

NPPES record last updated: August 12, 2025. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Aug 12, 2025, Sep 18, 2017 (2 updates tracked since 2017).

About Dr. Marichu Theresa A. Matas M.d. NPPES

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

DR. MARICHU THERESA A. MATAS M.D. (NPI 1558526228) is an individual internal medicine provider in Rockville, Maryland, licensed in Maryland (D0069148) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, is affiliated with Holy Cross Hospital, and is a graduate of Other (1990).

NPPES Registry Identity

NPI1558526228
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARICHU THERESA A. MATASCredential: M.D.
Location Address10110 MOLECULAR DRIVE, SUITE 206Rockville, MD 20850-7542
Mailing Address10110 Molecular Drive, Suite 206Rockville, MD 20850-7542 · (301) 279-2779 · Fax (240) 403-0190
Phone(301) 279-2779
Fax(240) 403-0190
Sole ProprietorNo
Medical School CMSOtherGraduated 1990
Enumeration DateJuly 22, 2008
Last NPPES UpdateAugust 12, 20252 updates tracked since enumeration
NPPES CertifiedAugust 12, 2025
✔ NPI 1558526228 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MD · D0069148
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License D69148 (MD)
10110 MOLECULAR DRIVE, Rockville, MD 20850
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Other Identifiers 2

Medicaid404776100MD
Medicaid026406700MD

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Molina Healthcare.Insurance ›

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

Dr. Marichu Theresa A. Matas M.d. 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 ID4183776743
PECOS Enrollment IDI20110307000840
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 5

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 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.
858 services393 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.
194 services190 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
93 services92 patients
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.
85 services62 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
24 services24 patients

Hospital Affiliations CMS Care Compare

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

Holy Cross Hospital

Acute Care Hospitals · Silver Spring, MD
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number210004
Location1500 Forest Glen RoadSilver Spring, MD 20910 · Montgomery County
Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20850 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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 4

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

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
5 suppliers55 claims55 services$13.67 avg. paid by Medicare
Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466
DME-Other DME · category DE005N
3 suppliers19 claims19 services$773.01 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
2 suppliers12 claims12 services$3.38 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
5 suppliers58 claims58 services$63.48 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 10

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

SAMEH ALY M.D.
Internal Medicine (Infectious Disease)
10110 MOLECULAR DRIVE, SUITE 105
ROCKVILLE, MD 20850
Montgomery County (301) 605-7468
DIMITRI IARIKOV MD
Internal Medicine (Infectious Disease)
10110 MOLECULAR DRIVE, SUITE 105
ROCKVILLE, MD 20850
Montgomery County (301) 605-7468
HOME BASED PRIMARY CARE OF DC INC.
Internal Medicine
10110 MOLECULAR DRIVE, SUITE 114
ROCKVILLE, MD 20850
Montgomery County (301) 343-6505
ADVANCED SURGERY CENTER,LLC
Clinic/Center (Endoscopy)
10110 MOLECULAR DRIVE, SUITE 100
ROCKVILLE, MD 20850
Montgomery County (301) 838-0437
MONTGOMERY MEDICAL ASSOCIATES, P.C.
Specialist
10110 MOLECULAR DRIVE, SUITE 206
ROCKVILLE, MD 20850
Montgomery County (301) 279-2779
MRS. KAREN LYNNE FOX CRNP
Nurse Practitioner (Adult Health)
10110 MOLECULAR DRIVE, SUITE 206
ROCKVILLE, MD 20850
Montgomery County (301) 279-2779
MS. ARIELLE ANDERSON
Emergency Medical Technician, Basic
10110 MOLECULAR DRIVE
ROCKVILLE, MD 20850
Montgomery County (301) 838-4224
ALI ASAD ARASTU MD
Internal Medicine (Infectious Disease)
10110 MOLECULAR DRIVE, SUITE 105
ROCKVILLE, MD 20850
Montgomery County (301) 605-7468

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 Marichu Theresa Matas's NPI number?

The NPI number for Marichu Theresa Matas is 1558526228. It was assigned to this individual provider in the NPPES registry on July 22, 2008.

Where is Marichu Theresa Matas located?

Marichu Theresa Matas practices at 10110 Molecular Drive Suite 206, Rockville, MD 20850. The listed phone number is (301) 279-2779.

What is Marichu Theresa Matas's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marichu Theresa Matas enrolled in Medicare?

Yes. Marichu Theresa Matas 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.

What insurance does Marichu Theresa Matas accept?

Health plans from Molina Healthcare list Marichu Theresa Matas 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 Marichu Theresa Matas affiliated with any hospitals?

According to CMS data, Marichu Theresa Matas is affiliated with Holy Cross Hospital.

When was this NPI record last updated?

The NPPES record for Marichu Theresa Matas was last updated on August 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.