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DR. GILLIAN ALTHEA JACOB M.D.
NPI 1285617498
Obstetrics & Gynecology in Leesburg, VA

Active since November 22, 2005PECOS EnrolledAccepts Medicare Assignment
52.15/100
CMS Quality Rating
161 FORT EVANS RD NE, SUITE 320, LEESBURG, VA 20176(703) 777-5111(703) 777-8465 Get Directions Write a Review

NPPES record last updated: October 30, 2023. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Oct 30, 2023, Oct 1, 2018 (2 updates tracked since 2018).

About Dr. Gillian Althea Jacob M.d. NPPES

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

DR. GILLIAN ALTHEA JACOB M.D. (NPI 1285617498) is an individual obstetrics & gynecology provider in Leesburg, Virginia, licensed in Virginia (0101238135) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS, is affiliated with Inova Loudoun Hospital, and is a graduate of University Of Maryland School Of Medicine (2001).

NPPES Registry Identity

NPI1285617498
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. GILLIAN ALTHEA JACOBCredential: M.D.
Location Address161 FORT EVANS RD NE, SUITE 320Leesburg, VA 20176-3369
Mailing Address8110 Maple Lawn Blvd Ste 235Fulton, MD 20759-2694 · (301) 340-8339 · Fax (301) 340-9027
Phone(703) 777-5111
Fax(703) 777-8465
Sole ProprietorNo
Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2001
Enumeration DateNovember 22, 2005
Last NPPES UpdateOctober 30, 20232 updates tracked since enumeration
NPPES CertifiedOctober 30, 2023
✔ NPI 1285617498 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in VA · 0101238135
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.
161 FORT EVANS RD NE, Leesburg, VA 20176
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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. Gillian Althea Jacob 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 ID6204869274
PECOS Enrollment IDI20140225000630
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

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
14 services12 patients

Hospital Affiliations CMS Care Compare

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

Inova Loudoun Hospital

Acute Care Hospitals · Leesburg, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490043
Location44045 Riverside ParkwayLeesburg, VA 20176 · Loudoun County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20176 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
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$70.08 typical visit price
range $18.07 – $138.91
Typical copayment $17.52 (range $4.51 – $34.72)
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.

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.

52.15/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality14.28
Promoting Interoperability67
Improvement Activities40
Cost53.74

Other Providers at the Same Location NPPES 7

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

DR. JANE ALLEN MD
Obstetrics & Gynecology
161 FORT EVANS RD NE, SUITE 320
LEESBURG, VA 20176
Loudoun County (703) 777-5111
CHIRAG SANGHVI M.D., MPH
Anesthesiology (Pain Medicine)
161 FORT EVANS RD NE, SUITE 340
LEESBURG, VA 20176
Loudoun County (703) 443-8000
LEESBURG PREMIER DENTAL
Dentist (General Practice)
161 FORT EVANS RD NE, SUITE- 300
LEESBURG, VA 20176
Loudoun County (703) 687-4861
CHILDREN & ADOLESCENT PEDIATRIC SERVICES PLLC
Pediatrics
161 FORT EVANS RD NE, SUITE 330
LEESBURG, VA 20176
Loudoun County (703) 777-5224
DR. MOHAMMAD SHARIFUL AMAN D.M.D.
Dentist (General Practice)
161 FORT EVANS RD NE, SUITE 300
LEESBURG, VA 20176
Loudoun County (703) 687-4861
DR. CATHLEEN SHANTZ MILLS MD
Obstetrics & Gynecology
161 FORT EVANS RD NE, STE 320
LEESBURG, VA 20176
Loudoun County (703) 777-5111
NEWBRIDGE SPINE AND PAIN CENTER OF VIRGINIA LLC
Specialist
161 FORT EVANS RD NE, SUITE 340
LEESBURG, VA 20176
Loudoun County (703) 443-8000

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 Gillian Jacob's NPI number?

The NPI number for Gillian Jacob is 1285617498. It was assigned to this individual provider in the NPPES registry on November 22, 2005.

Where is Gillian Jacob located?

Gillian Jacob practices at 161 Fort Evans Rd NE Suite 320, Leesburg, VA 20176. The listed phone number is (703) 777-5111.

What is Gillian Jacob's specialty?

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

Is Gillian Jacob enrolled in Medicare?

Yes. Gillian Jacob 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 Gillian Jacob affiliated with any hospitals?

According to CMS data, Gillian Jacob is affiliated with Inova Loudoun Hospital.

When was this NPI record last updated?

The NPPES record for Gillian Jacob was last updated on October 30, 2023. NPI Profile syncs with the weekly NPPES data releases published by CMS.