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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. MARK MENDEL SKLAR M.D.
NPI 1720083223
Internal Medicine - Endocrinology, Diabetes & Metabolism in Washington, DC

Active since June 20, 2005Opted out of Medicare · through Apr 1, 2027
3 WASHINGTON CIR NW, STE 303, WASHINGTON, DC 20037(202) 887-4769(202) 223-2552 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Mark Mendel Sklar M.d. NPPES

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

DR. MARK MENDEL SKLAR M.D. (NPI 1720083223) is an individual endocrinology, diabetes & metabolism provider in Washington, District Of Columbia, licensed in District Of Columbia (MD18512) and active in the NPI registry since June 2005. He has opted out of Medicare through April 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1720083223
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDR. MARK MENDEL SKLARCredential: M.D.
Location Address3 WASHINGTON CIR NW, STE 303Washington, DC 20037-2311
Mailing Address8101 Falstaff RdMc Lean, VA 22102-2730 · (703) 893-0962 · Fax (202) 223-2552
Phone(202) 887-4769
Fax(202) 223-2552
Sole ProprietorNo
Enumeration DateJune 20, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1720083223 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in DC · MD18512
Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

3 WASHINGTON CIR NW, Washington, DC 20037
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Mark Mendel Sklar M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 1, 2025 through April 1, 2027.

Opt-Out Effective DateApril 1, 2025
Opt-Out In Effect ThroughApril 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Areas of Expertise CMS Part B claims 11

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 moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
346 services188 patients
Insertion of needle into vein (3 years or older) 36410
This procedure involves placing a small needle into a vein, typically in the arm. It's done to collect blood for testing or to deliver medication. You may feel a quick pinch, but it's usually over in seconds. It's a common, safe procedure.
292 services193 patients
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.
160 services145 patients
Ultrasound scan of head and neck soft tissue 76536
An ultrasound scan of the head and neck soft tissue is a non-invasive procedure that uses sound waves to create images of the soft tissues in these areas. It helps identify any abnormalities or issues, such as tumors, cysts, or infections. It's painless and doesn't involve radiation.
88 services86 patients
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251
This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.
63 services34 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
51 services40 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20037 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.

Reported Quality Measures

Breast Cancer Screening
Percentage of women 50-74 years of age who had a mammogram to screen for breast cancer
0%471 patients1/55-star benchmark: 92%
Diabetes: Eye Exam
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
95%245 patients4/55-star benchmark: 100%
Diabetes: Foot Exam
The percentage of patients 18-75 years of age with diabetes (type 1 and type 2) who received a foot exam (visual inspection and sensory exam with mono filament and a pulse exam) during the measurement year
100%245 patients5/55-star benchmark: 98%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
85%3,336 patients3/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
100%3,453 patients5/55-star benchmark: 100%
Falls: Screening for Future Fall Risk
Percentage of patients 65 years of age and older who were screened for future fall risk during the measurement period
0%487 patients1/55-star benchmark: 99%
Health Information Exchange
The MIPS eligible clinician that transitions or refers their patient to another setting of care or health care clinician (1) uses CEHRT to create a summary of care record; and (2) electronically transmits such summary to a receiving health care clinician for…
0%3,769 patients1/55-star benchmark: 98%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
79%173 patients4/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
90%1,292 patients4/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
46%1,288 patients2/55-star benchmark: 97%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
48%850 patients3/55-star benchmark: 88%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients tobacco: 89% · 976 patients
91%976 patients
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
93%1,292 patients4/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
3%1,292 patients1/55-star benchmark: 79%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 1% · 487 patients
3%487 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 7

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

Supplies for maintenance of insulin infusion catheter, per week A4224
DME-Other DME · category DE017N
6 suppliers38 claims471 services$17.95 avg. paid by Medicare
Supplies for external insulin infusion pump, syringe type cartridge, sterile, each A4225
DME-Other DME · category DE017N
7 suppliers39 claims1,215 services$2.36 avg. paid by Medicare
Supply allowance for adjunctive continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service A4238
DME-Medical/Surgical Supplies · category DA000N
1 supplier13 claims13 services$172.21 avg. paid by Medicare
Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
20 suppliers52 claims188 services$6.02 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
9 suppliers20 claims30 services$1.01 avg. paid by Medicare
Insulin for administration through dme (i.e., insulin pump) per 50 units J1817
Treatment-Injections and Infusions (nononcologic) · category RI000N
3 suppliers11 claims1,020 services$6.90 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 20

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

DR. RAFAEL ATANASIO LOPEZ STEUART MD
Orthopaedic Surgery
3 WASHINGTON CIR NW, SUITE 110
WASHINGTON, DC 20037
District of Columbia (202) 429-3700
DR. ANNE E BUSSENIERS MD
Pathology (Cytopathology)
3 WASHINGTON CIR NW, #303
WASHINGTON, DC 20037
District of Columbia (202) 463-5149
PHILIP J SILVERMAN PH.D.
Psychologist (Clinical)
3 WASHINGTON CIR NW, #206
WASHINGTON, DC 20037
District of Columbia (202) 822-0078
DR. SINAN DUZYUREK M.D.
Psychiatry & Neurology (Psychiatry)
3 WASHINGTON CIR NW, SUITE 406
WASHINGTON, DC 20037
District of Columbia (202) 466-3966
JAMES HENRY GRAETER M.D.
Orthopaedic Surgery
3 WASHINGTON CIR NW, SUITE 404
WASHINGTON, DC 20037
District of Columbia (202) 333-2820
DR. AKRAM HASSAN SHOUHAYIB DDS, MS
Dentist (Orthodontics and Dentofacial Orthopedics)
3 WASHINGTON CIR NW, SUITE 306
WASHINGTON, DC 20037
District of Columbia (202) 775-0167
DR. TAREK MOHAMMAD MOGHARBEL DDS
Dentist
3 WASHINGTON CIR NW, SUITE 306
WASHINGTON, DC 20037
District of Columbia (202) 775-0167
DR. ANDREW TODD GOLDSTEIN M.D.
Obstetrics & Gynecology (Gynecology)
3 WASHINGTON CIR NW, SUITE 205
WASHINGTON, DC 20037
District of Columbia (202) 887-0568

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 Mark Sklar's NPI number?

The NPI number for Mark Sklar is 1720083223. It was assigned to this individual provider in the NPPES registry on June 20, 2005.

Where is Mark Sklar located?

Mark Sklar practices at 3 Washington Cir NW Ste 303, Washington, DC 20037. The listed phone number is (202) 887-4769.

What is Mark Sklar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Mark Sklar enrolled in Medicare?

No. Mark Sklar has opted out of Medicare through April 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Mark Sklar was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.