DR. MARK SONNENSCHINE D.O.
NPI 1922291939
Internal Medicine - Hematology & Oncology in Brooklyn, NY

Q: What is Mark Sonnenschine's NPI number?

The NPI number for Mark Sonnenschine is 1922291939. It was assigned to this individual provider in the NPPES registry on August 22, 2007.

Q: What is Mark Sonnenschine's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Q: When was this NPI record last updated?

The NPPES record for Mark Sonnenschine was last updated on February 4, 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.

Active since August 22, 2007PECOS EnrolledAccepts Medicare Assignment

6201 15TH AVE # 305, BROOKLYN, NY 11219(718) 775-2700(718) 705-5804 Get Directions Write a Review

NPPES record last updated: February 4, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 4, 2026, Sep 20, 2018 (2 updates tracked since 2018).

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About Dr. Mark Sonnenschine D.o. NPPES

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

DR. MARK SONNENSCHINE D.O. (NPI 1922291939) is an individual hematology & oncology provider in Brooklyn, New York, licensed in New York (242242) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS, is affiliated with Maimonides Medical Center, and maintains a secondary practice location in Brooklyn.

NPPES Registry Identity

NPI1922291939

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameDR. MARK SONNENSCHINECredential: D.O.

Location Address6201 15TH AVE # 305Brooklyn, NY 11219-5411

Mailing Address2083 New York AveBrooklyn, NY 11210-5423 · (718) 252-2106

Phone(718) 775-2700

Fax(718) 705-5804

Sole ProprietorYes

Medical School CMSNew York College Of Osteo Medicine Of New York Institute Of TechnologyGraduated 2003

Enumeration DateAugust 22, 2007

Last NPPES UpdateFebruary 4, 20262 updates tracked since enumeration

NPPES CertifiedFebruary 4, 2026

✔ NPI 1922291939 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in NY · 242242

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Also ListedInternal MedicineTaxonomy 207R00000X · License 242242 (NY)

6201 15TH AVE # 305, Brooklyn, NY 11219

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Secondary Practice Location 1

Location 1705 Avenue UBrooklyn, NY 11223-4133 · Phone (718) 283-4232 · Fax (718) 705-5804

Other Identifiers 1

Medicaid03112214NY

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. Mark Sonnenschine D.o. 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 ID1850443870

PECOS Enrollment IDI20090722000110

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 12

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, ferric carboxymaltose, 1 mg J1439

Ferric carboxymaltose is an iron supplement injection. It's given when your body needs more iron than you can consume through diet, like in anemia. The injection is administered by a healthcare professional into a vein.

49,500 services26 patients

Injection, epoetin alfa, (for non-esrd use), 1000 units J0885

Epoetin alfa is a medication injected to help your body produce more red blood cells, improving energy levels and reducing tiredness. It's often used for patients with certain types of anemia. Each injection contains 1000 units of the medicine.

2,210 services12 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

623 services155 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

271 services250 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

178 services75 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.

176 services66 patients

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.

166 services68 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.

148 services25 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

111 services37 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

66 services31 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

33 services33 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

17 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Maimonides Medical Center

Acute Care Hospitals · Brooklyn, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330194

Location4802 Tenth AvenueBrooklyn, NY 11219 · Kings County

Emergency services Birthing friendly

South Brooklyn Health

Acute Care Hospitals · Brooklyn, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number330196

Location2601 Ocean ParkwayBrooklyn, NY 11235 · Kings County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11219 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

$203.53 typical visit price

range $67.40 – $203.53

Typical copayment $50.88 (range $16.85 – $50.88)

Most-billed visit code 99205

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

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 12

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

Sterile water/saline, 500 ml A4217

DME-Medical/Surgical Supplies · category DA000N

4 suppliers30 claims1,092 services$2.58 avg. paid by Medicare

Tracheal suction catheter, closed system, each A4605

DME-Other DME · category DE000N

4 suppliers31 claims690 services$15.84 avg. paid by Medicare

Tracheostomy, inner cannula A4623

DME-Orthotic Devices · category DF000N

4 suppliers26 claims1,170 services$6.33 avg. paid by Medicare

Oropharyngeal suction catheter, each A4628

DME-Other DME · category DE000N

4 suppliers31 claims166 services$3.55 avg. paid by Medicare

Tracheostomy care kit for established tracheostomy A4629

DME-Orthotic Devices · category DF000N

4 suppliers30 claims903 services$4.49 avg. paid by Medicare

Canister, disposable, used with suction pump, each A7000

DME-Other DME · category DE000N

4 suppliers29 claims128 services$6.65 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Sonnenschine's NPI number?

The NPI number for Mark Sonnenschine is 1922291939. It was assigned to this individual provider in the NPPES registry on August 22, 2007.

Where is Mark Sonnenschine located?

Mark Sonnenschine practices at 6201 15th Ave # 305, Brooklyn, NY 11219. The listed phone number is (718) 775-2700.

What is Mark Sonnenschine's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Mark Sonnenschine enrolled in Medicare?

Yes. Mark Sonnenschine 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 Mark Sonnenschine affiliated with any hospitals?

According to CMS data, Mark Sonnenschine is affiliated with Maimonides Medical Center and South Brooklyn Health.

When was this NPI record last updated?

The NPPES record for Mark Sonnenschine was last updated on February 4, 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.