MS. KEIKO IWAHARA GREENBERG
NPI 1588807408
Internal Medicine - Nephrology in Baltimore, MD

Q: What is Keiko Greenberg's NPI number?

The NPI number for Keiko Greenberg is 1588807408. It was assigned to this individual provider in the NPPES registry on April 7, 2009.

Q: What is Keiko Greenberg's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Q: When was this NPI record last updated?

The NPPES record for Keiko Greenberg was last updated on January 1, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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 April 07, 2009PECOS EnrolledAccepts Medicare Assignment

76.55/100

CMS Quality Rating

1830 E MONUMENT ST STE 416, BALTIMORE, MD 21287(410) 955-5268 Get Directions Write a Review

NPPES record last updated: January 1, 2016. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Ms. Keiko Iwahara Greenberg NPPES

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

MS. KEIKO IWAHARA GREENBERG (NPI 1588807408) is an individual nephrology provider in Baltimore, Maryland, licensed in Maryland (D0079185) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS and is a graduate of University Of Virginia School Of Medicine (2009).

NPPES Registry Identity

NPI1588807408

Entity TypeIndividualFemale

Primary Taxonomy207RN0300X

Provider Legal NameMS. KEIKO IWAHARA GREENBERG

Location Address1830 E MONUMENT ST STE 416Baltimore, MD 21287-0020

Mailing Address1830 E Monument St Ste 416Baltimore, MD 21287-0020 · (410) 955-5268

Phone(410) 955-5268

Sole ProprietorNo

Medical School CMSUniversity Of Virginia School Of MedicineGraduated 2009

Enumeration DateApril 7, 2009

Last NPPES UpdateJanuary 1, 2016

✔ NPI 1588807408 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in MD · D0079185

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

1830 E MONUMENT ST STE 416, Baltimore, MD 21287

Open in Google Maps ↗

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

Ms. Keiko Iwahara Greenberg 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 ID7315174166

PECOS Enrollment IDI20200418000121

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 13

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.

616 services146 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 services101 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.

95 services46 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.

53 services50 patients

Dialysis services, 2-3 physician visits per month (20 years or older) 90961

Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.

49 services19 patients

Home dialysis services per month (20 years or older) 90966

Home dialysis services provide kidney treatment for patients aged 20 or older right in their own homes. This service includes necessary equipment, supplies, and support for performing dialysis. It's a convenient option that allows patients to maintain their daily routines while receiving essential care.

40 services12 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.

29 services20 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.

25 services24 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

23 services17 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

18 services17 patients

Hemodialysis procedure with physician evaluation 90935

Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.

15 services12 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.

12 services12 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.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21287 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

$139.05 typical visit price

range $60.73 – $183.44

Typical copayment $34.76 (range $15.18 – $45.86)

Most-billed visit code 99204

Established Patient

$106.59 typical visit price

range $19.60 – $149.17

Typical copayment $26.64 (range $4.90 – $37.29)

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.

76.55/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

63.16

Promoting Interoperability

100

Improvement Activities

Cost

55.94

Referred Medical Equipment & Supplies CMS DME claims 2

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

Tacrolimus, immediate release, oral, 1 mg J7507

Treatment-Treatment - Miscellaneous · category RX029N

2 suppliers11 claims1,680 services$0.25 avg. paid by Medicare

Mycophenolate mofetil, oral, 250 mg J7517

Treatment-Treatment - Miscellaneous · category RX029N

2 suppliers11 claims1,920 services$0.17 avg. paid by Medicare

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

Leave this field empty

Other Providers at the Same Location NPPES 13

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

SAI PRASAD DESIKAN MD

Internal Medicine (Nephrology)