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MARIANA SYLVIA JOANNE MIDDELHOF M.D
NPI 1710293337
Pediatrics - Pediatric Gastroenterology in Fairfax, VA

Active since August 19, 2010PECOS Enrolled
82.63/100
CMS Quality Rating
3023 HAMAKER CT STE 600, FAIRFAX, VA 22031(703) 839-8733(703) 839-8779 Get Directions Write a Review

NPPES record last updated: April 16, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 16, 2026, May 23, 2025, Aug 31, 2022 and 2 more (5 updates tracked since 2016).

About Mariana Sylvia Joanne Middelhof M.d NPPES

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

MARIANA SYLVIA JOANNE MIDDELHOF M.D (NPI 1710293337) is an individual pediatric gastroenterology provider in Fairfax, Virginia, licensed in Virginia (0101283490) and active in the NPI registry since August 2010. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1710293337
Entity TypeIndividualFemale
Primary Taxonomy2080P0206X
Provider Legal NameMARIANA SYLVIA JOANNE MIDDELHOFCredential: M.D
Location Address3023 HAMAKER CT STE 600Fairfax, VA 22031-2241
Mailing Address3023 Hamaker Ct Ste 600Fairfax, VA 22031-2241 · (703) 876-2788 · Fax (703) 839-8764
Phone(703) 839-8733
Fax(703) 839-8779
Sole ProprietorNo
Enumeration DateAugust 19, 2010
Last NPPES UpdateApril 16, 20265 updates tracked since enumeration
NPPES CertifiedApril 16, 2026
✔ NPI 1710293337 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0206X
Licenses✔ Licensed in VA · 0101283490✔ Licensed in FL · ME129529✔ Licensed in NY · 282433
Definition
A pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.
Also ListedPediatricsTaxonomy 208000000X · License 0101283490 (VA)
3023 HAMAKER CT STE 600, Fairfax, VA 22031
Open in Google Maps ↗

Other Identifiers 1

OtherME129529FL · Fl Medical License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mariana Sylvia Joanne Middelhof M.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

2

Medicare enrollment records show Mariana Middelhof reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pediatric Specialists Of Virginia, LLC
Same address
Pediatrics
3023 HAMAKER CT, SUITE 200
Fairfax, VA 22031
  • Reassigned Medicare billing, District of Columbia enrollment
  • 128 clinicians in this Medicare group
NPI 1699119818 (703) 848-6627
Inova Health Care Services
0.6 mi
Multi-Specialty
2740 PROSPERITY AVE STE 200
Fairfax, VA 22031
  • Reassigned Medicare billing, District of Columbia enrollment
  • 2,618 clinicians in this Medicare group
NPI 1669511051 (703) 321-2600

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 2

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.

Injection, denosumab, 1 mg J0897
Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.
1,440 services21 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
47 services27 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22031 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

82.63/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality74.96
Promoting Interoperability100
Improvement Activities40
Cost67.14

Other Providers at the Same Location NPPES 15

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

NEDA KASHANIAN D.T.
Dietitian, Registered
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2788
RANDALA R LAKKIS M.D.
Pediatrics (Pediatric Nephrology)
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2788
HANNAH NICOLAIS RD
Dietitian, Registered
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 848-6627
RASHEDA Z AMIN M.D.
Pediatrics (Pediatric Nephrology)
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2788
DR. EMILY ELIZABETH WAY M.D.
Pediatrics (Pediatric Rheumatology)
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2778
IRIS JO-SHI D.O.
Pediatrics (Pediatric Gastroenterology)
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2788
DR. KENDRA BATTAGLIA LUBARSKY PSY.D.
Psychologist
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2788
DR. STEPHANIE SMITH MD
Pediatrics (Pediatric Infectious Diseases)
3023 HAMAKER CT STE 600
FAIRFAX, VA 22031
Fairfax County (703) 876-2788

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 Mariana Middelhof's NPI number?

The NPI number for Mariana Middelhof is 1710293337. It was assigned to this individual provider in the NPPES registry on August 19, 2010.

Where is Mariana Middelhof located?

Mariana Middelhof practices at 3023 Hamaker Ct Ste 600, Fairfax, VA 22031. The listed phone number is (703) 839-8733.

What is Mariana Middelhof's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Is Mariana Middelhof enrolled in Medicare?

Yes. Mariana Middelhof is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mariana Middelhof's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mariana Middelhof reassigns Medicare benefits to 2 organizations: Pediatric Specialists Of Virginia, LLC (Fairfax, VA) and Inova Health Care Services (Fairfax, VA). 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 Mariana Middelhof's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mariana Middelhof accept?

Health plans from Oscar Health list Mariana Middelhof 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 Mariana Middelhof was last updated on April 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.