PETER I YI M.D.
NPI 1457499618
Internal Medicine - Hematology & Oncology in Princeton, NJ

Q: What is Peter Yi's NPI number?

The NPI number for Peter Yi is 1457499618. It was assigned to this individual provider in the NPPES registry on February 1, 2007.

Q: What is Peter Yi'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 Peter Yi was last updated on January 12, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.

Active since February 01, 2007PECOS EnrolledAccepts Medicare Assignment

419 N HARRISON ST, SUITE 101, PRINCETON, NJ 08540(609) 924-9300(609) 430-9481 Get Directions Write a Review

NPPES record last updated: January 12, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Peter I Yi M.d. NPPES

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

PETER I YI M.D. (NPI 1457499618) is an individual hematology & oncology provider in Princeton, New Jersey, licensed in New Jersey (25MA05176900) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with University Medical Center Of Princeton At Plainsboro, and is a graduate of Js Weill Medical College, Cornell University (1984).

NPPES Registry Identity

NPI1457499618

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NamePETER I YICredential: M.D.

Location Address419 N HARRISON ST, SUITE 101Princeton, NJ 08540-3521

Mailing Address419 N Harrison StPrinceton, NJ 08540-3521 · (609) 924-9300 · Fax (609) 430-9481

Phone(609) 924-9300

Fax(609) 430-9481

Sole ProprietorNo

Medical School CMSJs Weill Medical College, Cornell UniversityGraduated 1984

Enumeration DateFebruary 1, 2007

Last NPPES UpdateJanuary 12, 2015

✔ NPI 1457499618 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in NJ · 25MA05176900

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.

419 N HARRISON ST, Princeton, NJ 08540

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Other Identifiers 11

OtherMES083Oxford Specialty

Other0429725000Amerihlth Ibc Specialty

Other110137132Railroad Med. Monroe

Other607077Amerihlth Admin Specialty

Other1811185United Healthcare

Other898197Aetna Hmo Nonhmo Spec.

OtherMEP077Oxford Pcp

Medicare UPINA58836

Medicaid0365700NJ

Medicare PIN607077AP0NJ

Other110137127Railroad Med. Princeton

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

Peter I Yi 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 ID1153331731

PECOS Enrollment IDI20101116000090

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 Peter Yi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Princeton Medical Group,p.A.

Same address

Internal Medicine

419 N HARRISON ST, SUITE 203
Princeton, NJ 08540

Reassigned Medicare billing, New Jersey enrollment
36 clinicians in this Medicare group

NPI 1063513679 (609) 924-9300

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 38

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.

27,750 services11 patients

Injection, fosaprepitant, 1 mg J1453

Fosaprepitant is an anti-nausea medication given via injection. It's often used to prevent nausea and vomiting caused by chemotherapy. This injection blocks signals to the brain that trigger these symptoms, helping you feel better.

17,100 services16 patients

Injection, darbepoetin alfa, 1 microgram (non-esrd use) J0881

Darbepoetin alfa injection is a medication used to treat anemia (low red blood cell count) often caused by chronic kidney disease or chemotherapy. It works by stimulating your body to produce more red blood cells, helping to increase your energy and well-being.

10,300 services11 patients

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.

5,520 services18 patients

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

2,526 services26 patients

Injection, palonosetron hcl, 25 mcg J2469

Palonosetron HCL is an injection used to prevent nausea and vomiting caused by chemotherapy. It works by blocking a natural substance (serotonin) in the body that can cause vomiting. This helps improve your comfort during cancer treatment.

1,910 services22 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.

1,115 services253 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

1,090 services253 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.

1,000 services241 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

985 services238 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

981 services242 patients

Injection of additional new drug or substance into vein 96375

This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.

713 services30 patients

Injection, pegfilgrastim-cbqv (udenyca), biosimilar, 0.5 mg Q5111

Pegfilgrastim-cbqv (Udenyca) is a medication given via injection to stimulate the growth of white blood cells, which help your body fight infections. It's often used for patients undergoing certain types of chemotherapy.

708 services12 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.

292 services42 patients

Ferritin (blood protein) level 82728

A Ferritin level test measures the amount of ferritin, a protein that stores iron, in your blood. It helps determine how much iron your body is storing. If levels are low, it may indicate iron deficiency, while high levels could signify conditions like iron overload.

286 services82 patients

Administration of chemotherapy into vein, 1 hour or less 96413

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

271 services35 patients

Carcinoembryonic antigen (cea) protein level 82378

Carcinoembryonic Antigen (CEA) protein level is a blood test often used in cancer care. It measures the amount of CEA protein in your blood, which can increase in cases of certain types of cancer. It's used to monitor treatment progress and check for cancer recurrence.

223 services56 patients

Lactate dehydrogenase (enzyme) level 83615

A Lactate Dehydrogenase level test measures the amount of this enzyme in your body. It's often done when tissue damage is suspected, as high levels can indicate issues like heart disease, lung disease, liver disease, or blood disorders. This test helps in diagnosing and monitoring these conditions.

189 services60 patients

Cyanocobalamin (vitamin b-12) level 82607

A Cyanocobalamin (Vitamin B-12) level test is a blood test that checks the amount of Vitamin B-12 in your body. This vitamin is vital for nerve function and the creation of red blood cells. Low or high levels could indicate a potential health issue.

160 services97 patients

Unclassified drugs J3490

Unclassified drugs are medications that don't fit into an existing category or class due to their unique properties or uses. They may be used for various conditions and their effects may differ widely. Always ask your healthcare provider for more information about these drugs.

155 services20 patients

Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less 96367

This procedure involves injecting fluids or medication directly into your vein. It's used for treatment, prevention, or diagnosis. An additional sequential infusion may be given within an hour if needed. This helps to ensure the medicine is distributed effectively in your body.

148 services18 patients

Injection, diphenhydramine hcl, up to 50 mg J1200

Diphenhydramine HCL injection is a medicine given to alleviate symptoms of allergies, colds, or hay fever. It can also help with motion sickness and certain symptoms of Parkinson's disease. Up to 50 mg may be administered depending on your condition.

145 services20 patients

Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg J3420

This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.

108 services15 patients

Psa (prostate specific antigen) measurement, total 84153

PSA measurement is a simple blood test that checks for a specific protein produced by your body. High levels could indicate a health issue that needs further investigation. It's often used to monitor general wellness and is part of routine health screening.

101 services22 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

86 services24 patients

Red blood cell sedimentation rate, to detect inflammation, non-automated 85651

The Red Blood Cell Sedimentation Rate test measures how quickly red blood cells settle at the bottom of a test tube. If they settle faster than normal, it may indicate inflammation in the body. This test is non-automated, meaning it's manually performed by a lab technician.

85 services54 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.

69 services61 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

68 services50 patients

Manual urinalysis test with examination using microscope, automated 81001

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

56 services20 patients

Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle 96401

This procedure involves giving anti-cancer drugs, which don't contain hormones, into the muscle or under the skin. These drugs help to stop the growth of cancer cells. The process is usually quick and done by a healthcare professional.

54 services18 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.

36 services24 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

31 services28 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

28 services28 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

27 services27 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

26 services18 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

21 services21 patients

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

20 services17 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

16 services14 patients

Hospital Affiliations CMS Care Compare 2

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

University Medical Center Of Princeton At Plainsboro

Acute Care Hospitals · Plainsboro, NJ

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310010

LocationOne-Five Plainsboro RoadPlainsboro, NJ 08536 · Middlesex County

Emergency services Birthing friendly

Hospital Of Univ Of Pennsylvania

Acute Care Hospitals · Philadelphia, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390111

Location34th & Spruce StsPhiladelphia, PA 19104 · Philadelphia County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 08540 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

$185.05 typical visit price

range $61.59 – $185.05

Typical copayment $46.26 (range $15.39 – $46.26)

Most-billed visit code 99205

Established Patient

$107.94 typical visit price

range $20.08 – $150.98

Typical copayment $26.98 (range $5.02 – $37.74)

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

56%314 patients3/55-star benchmark: 92%

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.

84%1,950 patients4/55-star benchmark: 100%

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

43%441 patients2/55-star benchmark: 90%

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

38%562 patients2/55-star benchmark: 88%

Provide Patient Access

For at least one unique patient seen by the MIPS eligible clinician: (1) The patient (or the patient authorized representative) is provided timely access to view online, download, and transmit his or her health information; and (2) The MIPS eligible clinician…

58%752 patients3/55-star benchmark: 100%

Request/Accept Summary of Care

For at least one transition of care or referral received or patient encounter in which the MIPS eligible clinician has never before encountered the patient, the MIPS eligible clinician receives or retrieves and incorporates into the patient's record an…

23%148 patients1/55-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 certified EHR technology to the patient (or the patient-authorized representative), or in…

59%752 patients4/55-star benchmark: 77%

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.

Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185

Other-Enteral and Parenteral · category OB005N

1 supplier14 claims110 services$4.26 avg. paid by Medicare

Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, 74 to 100 grams of protein - premix B4197

Other-Enteral and Parenteral · category OB005N

1 supplier14 claims50 services$281.16 avg. paid by Medicare

Parenteral nutrition supply kit; premix, per day B4220

Other-Enteral and Parenteral · category OB005N

1 supplier14 claims50 services$8.14 avg. paid by Medicare

Parenteral nutrition administration kit, per day B4224

Other-Enteral and Parenteral · category OB005N

1 supplier14 claims50 services$25.41 avg. paid by Medicare

Capecitabine, oral, 500 mg J8521

Treatment-Treatment - Miscellaneous · category RX029N

1 supplier30 claims2,184 services$0.65 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511

Treatment-Chemotherapy · category RH012N

1 supplier15 claims15 services$18.96 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.

RINKU GANDHI AGACNP-BC

Nurse Practitioner (Adult Health)

419 N HARRISON ST
PRINCETON, NJ 08540

Mercer County (609) 924-9300

DR. EDWARD VON DER SCHMIDT III MD

Neurological Surgery

419 N HARRISON ST, SUITE 204
PRINCETON, NJ 08540

Mercer County (609) 924-3614

CHAD ERIC STOCKHAM M.D.

Internal Medicine

419 N HARRISON ST
PRINCETON, NJ 08540

Mercer County (609) 924-9300

PRINCETON MEDICAL GROUP,P.A.

Internal Medicine

419 N HARRISON ST, SUITE 203
PRINCETON, NJ 08540

Mercer County (609) 924-9300

DR. JULIA T. DESANCTIS M.D.

Radiology (Diagnostic Radiology)

419 N HARRISON ST
PRINCETON, NJ 08540

Mercer County (609) 921-3345

TIFFANI METHVIEN OD

Optometrist

419 N HARRISON ST
PRINCETON, NJ 08540

Mercer County (609) 921-9437

DR. SIDNEY JACOB GOLDFARB MD

Urology

419 N HARRISON ST, STE 206
PRINCETON, NJ 08540

Mercer County (609) 921-3008

CASEY WONG M.D.

Internal Medicine (Cardiovascular Disease)

419 N HARRISON ST
PRINCETON, NJ 08540

Mercer County (609) 924-9300

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 Peter Yi's NPI number?

The NPI number for Peter Yi is 1457499618. It was assigned to this individual provider in the NPPES registry on February 1, 2007.

Where is Peter Yi located?

Peter Yi practices at 419 N Harrison St Suite 101, Princeton, NJ 08540. The listed phone number is (609) 924-9300.

What is Peter Yi's specialty?

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

Is Peter Yi enrolled in Medicare?

Yes. Peter Yi 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 Peter Yi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Peter Yi reassigns Medicare benefits to Princeton Medical Group,p.A. (Princeton, NJ). 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 Peter Yi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Peter Yi affiliated with any hospitals?

According to CMS data, Peter Yi is affiliated with University Medical Center Of Princeton At Plainsboro and Hospital Of Univ Of Pennsylvania.

When was this NPI record last updated?

The NPPES record for Peter Yi was last updated on January 12, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.