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DR. DANIEL TADEO MD
NPI 1144856287
Internal Medicine in Gaithersburg, MD

Active since March 20, 2020PECOS EnrolledAccepts Medicare Assignment
655 WATKINS MILL RD, GAITHERSBURG, MD 20879(240) 632-4000 Get Directions Write a Review

NPPES record last updated: August 25, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 25, 2023, Mar 20, 2020 (2 updates tracked since 2020).

About Dr. Daniel Tadeo Md NPPES

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

DR. DANIEL TADEO MD (NPI 1144856287) is an individual internal medicine provider in Gaithersburg, Maryland, licensed in Virginia (0101274219) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Virginia Hospital Center, and is a graduate of Georgetown University School Of Medicine (2020).

NPPES Registry Identity

NPI1144856287
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DANIEL TADEOCredential: MD
Location Address655 WATKINS MILL RDGaithersburg, MD 20879-3301
Mailing Address655 Watkins Mill RdGaithersburg, MD 20879-3301
Phone(240) 632-4000
Sole ProprietorNo
Medical School CMSGeorgetown University School Of MedicineGraduated 2020
Enumeration DateMarch 20, 2020
Last NPPES UpdateAugust 25, 20232 updates tracked since enumeration
NPPES CertifiedAugust 25, 2023
✔ NPI 1144856287 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 VA · 0101274219
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 ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
655 WATKINS MILL RD, Gaithersburg, MD 20879
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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. Daniel Tadeo 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 ID7719309657
PECOS Enrollment IDI20200622001961, I20230907000462, I20230907004190
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 Reassignment

Medicare enrollment records show Daniel Tadeo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc
Same address
Health Maintenance Organization
655 WATKINS MILL RD
Gaithersburg, MD 20879
NPI 1831471713 (301) 258-7700

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

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

Virginia Hospital Center

Acute Care Hospitals · Arlington, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490050
Location1701 North George Mason DriveArlington, VA 22205 · Arlington County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20879 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.

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.

DR. ESTHER SHINYOUNG SONG M.D.
Pediatrics
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4000
DR. VICTOR DAVID ELLIS III MD
Student in an Organized Health Care Education/Training Program
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4000
DR. PETER JAN BLUVAS JR. M.D.
Emergency Medicine
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (406) 324-2242
YOGESH PARUTHI
Pharmacist
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4155
ILYSSA KAREN HAAR RN, IBCLC, BSN
Registered Nurse (Lactation Consultant)
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4333
HAOBO ZHOU MD
General Acute Care Hospital
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4075
MR. SCOTT ERIC JACKSON RT(R)(CT)
Radiologic Technologist (Computed Tomography)
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4418
KATIE MARIE ESSER
Audiologist
655 WATKINS MILL RD
GAITHERSBURG, MD 20879
Montgomery County (240) 632-4000

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 Daniel Tadeo's NPI number?

The NPI number for Daniel Tadeo is 1144856287. It was assigned to this individual provider in the NPPES registry on March 20, 2020.

Where is Daniel Tadeo located?

Daniel Tadeo practices at 655 Watkins Mill Rd, Gaithersburg, MD 20879. The listed phone number is (240) 632-4000.

What is Daniel Tadeo's specialty?

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

Is Daniel Tadeo enrolled in Medicare?

Yes. Daniel Tadeo 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 organization bills Medicare for Daniel Tadeo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Daniel Tadeo reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc (Gaithersburg, MD). The 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 Daniel Tadeo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Daniel Tadeo affiliated with any hospitals?

According to CMS data, Daniel Tadeo is affiliated with Virginia Hospital Center.

When was this NPI record last updated?

The NPPES record for Daniel Tadeo was last updated on August 25, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.