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DR. ELION J KROK M.D.
NPI 1538468491
Internal Medicine - Endocrinology, Diabetes & Metabolism in West Orange, NJ

Active since March 17, 2011PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
993 PLEASANT VALLEY WAY, WEST ORANGE, NJ 07052(973) 544-8901(866) 929-9843 Get Directions Write a Review

NPPES record last updated: February 27, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 27, 2023, Jan 26, 2023, May 4, 2020 and 1 more (4 updates tracked since 2016).

About Dr. Elion J Krok M.d. NPPES

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

DR. ELION J KROK M.D. (NPI 1538468491) is an individual endocrinology, diabetes & metabolism provider in West Orange, New Jersey, licensed in New Jersey (25MA08957000) and active in the NPI registry since March 2011. He is enrolled in Medicare PECOS, is affiliated with Clara Maass Medical Center, and is a graduate of Other (1983).

NPPES Registry Identity

NPI1538468491
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDR. ELION J KROKCredential: M.D.
Location Address993 PLEASANT VALLEY WAYWest Orange, NJ 07052-1801
Mailing Address993 Pleasant Valley WayWest Orange, NJ 07052-1801 · (973) 544-8901 · Fax (866) 929-9843
Phone(973) 544-8901
Fax(866) 929-9843
Sole ProprietorNo
Medical School CMSOtherGraduated 1983
Enumeration DateMarch 17, 2011
Last NPPES UpdateFebruary 27, 20234 updates tracked since enumeration
NPPES CertifiedFebruary 27, 2023
✔ NPI 1538468491 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in NJ · 25MA08957000
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.
Also ListedInternal MedicineTaxonomy 207R00000X · License 25MA08957000 (NJ)
Also ListedInternal Medicine · Obesity MedicineTaxonomy 207RB0002X · License 25MA08957000 (NJ)
993 PLEASANT VALLEY WAY, West Orange, NJ 07052
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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 and accepts Medicare assignment

Dr. Elion J Krok 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 ID2466624929
PECOS Enrollment IDI20111006000215
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 Elion Krok reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Elion Krok, M.D. PC
Same address
Endocrinology, Diabetes & Metabolism
993 PLEASANT VALLEY WAY
West Orange, NJ 07052
  • Reassigned Medicare billing, New Jersey enrollment
  • 3 clinicians in this Medicare group
NPI 1124399308 (973) 544-8901
Hudson MD Group
18 mi
Family Medicine
464 HUDSON TER STE 201
Englewood Cliffs, NJ 07632
  • Reassigned Medicare billing, New Jersey enrollment
  • 155 clinicians in this Medicare group
NPI 1497301998 (201) 503-0828

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 10

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.

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.
3,430 services235 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.
1,516 services144 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.
539 services124 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.
304 services267 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.
23 services23 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
19 services19 patients

Hospital Affiliations CMS Care Compare 3

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

Clara Maass Medical Center

Acute Care Hospitals · Belleville, NJ
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310009
LocationOne Clara Maass DriveBelleville, NJ 07109 · Essex County
Emergency services Birthing friendly

Morristown Medical Center

Acute Care Hospitals · Morristown, NJ
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310015
Location100 Madison AveMorristown, NJ 07960 · Morris County
Emergency services Birthing friendly

Cooperman Barnabas Medical Center

Acute Care Hospitals · Livingston, NJ
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310076
Location94 Old Short Hills RoadLivingston, NJ 07039 · Essex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07052 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
$144.86 typical visit price
range $63.84 – $190.92
Typical copayment $36.21 (range $15.96 – $47.73)
Most-billed visit code 99204
Established Patient
$111.57 typical visit price
range $20.97 – $155.92
Typical copayment $27.89 (range $5.24 – $38.98)
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.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice

Reported Quality Measures

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.
89%1,527 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.
73%576 patients3/55-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.
6%176 patients1/55-star benchmark: 100%
Preventive Care and Screening: Screening for Depression and Follow-Up Plan
Percentage of patients aged 12 years and older screened for depression on the date of the encounter using an age appropriate standardized depression screening tool AND if positive, a follow-up plan is documented on the date of the positive screen
10%237 patients1/55-star benchmark: 100%
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…
95%176 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…
47%176 patients3/55-star benchmark: 79%
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 11

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

Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
3 suppliers16 claims488 services$4.29 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
5 suppliers22 claims12,686 services$0.27 avg. paid by Medicare
Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185
Other-Enteral and Parenteral · category OB005N
3 suppliers45 claims443 services$11.08 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
2 suppliers43 claims273 services$281.16 avg. paid by Medicare
Parenteral nutrition supply kit; premix, per day B4220
Other-Enteral and Parenteral · category OB005N
3 suppliers43 claims109 services$8.09 avg. paid by Medicare
Parenteral nutrition administration kit, per day B4224
Other-Enteral and Parenteral · category OB005N
3 suppliers45 claims280 services$25.20 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

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

ELION KROK, M.D. PC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
993 PLEASANT VALLEY WAY
WEST ORANGE, NJ 07052
Essex County (973) 544-8901

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 Elion Krok's NPI number?

The NPI number for Elion Krok is 1538468491. It was assigned to this individual provider in the NPPES registry on March 17, 2011.

Where is Elion Krok located?

Elion Krok practices at 993 Pleasant Valley Way, West Orange, NJ 07052. The listed phone number is (973) 544-8901.

What is Elion Krok's specialty?

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

Is Elion Krok enrolled in Medicare?

Yes. Elion Krok 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 organizations bill Medicare for Elion Krok's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Elion Krok reassigns Medicare benefits to 2 organizations: Elion Krok, M.D. PC (West Orange, NJ) and Hudson MD Group (Englewood Cliffs, NJ). 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 Elion Krok's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Elion Krok accept?

Health plans from Oscar Health list Elion Krok 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.

Is Elion Krok affiliated with any hospitals?

According to CMS data, Elion Krok is affiliated with Clara Maass Medical Center, Morristown Medical Center and Cooperman Barnabas Medical Center.

When was this NPI record last updated?

The NPPES record for Elion Krok was last updated on February 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.