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KATHERINE G RUIZ-MELLOTT M.D.,MPH
NPI 1962516864
Psychiatry & Neurology - Psychiatry in Haverhill, MA

Active since August 18, 2006PECOS EnrolledAccepts Medicare Assignment
76 SUMMER STREET, WHITTIER PAVILION, HAVERHILL, MA 01830(978) 556-6229 Get Directions Write a Review

NPPES record last updated: September 21, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Katherine G Ruiz-mellott M.d.,mph NPPES

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

KATHERINE G RUIZ-MELLOTT M.D.,MPH (NPI 1962516864) is an individual psychiatry provider in Haverhill, Massachusetts, licensed in Massachusetts (227275) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (1998).

NPPES Registry Identity

NPI1962516864
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameKATHERINE G RUIZ-MELLOTTCredential: M.D.,MPH
Location Address76 SUMMER STREET, WHITTIER PAVILIONHaverhill, MA 01830
Mailing Address310 South StJamaica Plain, MA 02130-3510 · (617) 459-9283
Phone(978) 556-6229
Sole ProprietorNo
Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 1998
Enumeration DateAugust 18, 2006
Last NPPES UpdateSeptember 21, 2009
✔ NPI 1962516864 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MA · 227275
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
76 SUMMER STREET, Haverhill, MA 01830
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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

Katherine G Ruiz-mellott M.d.,mph 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 ID7810088085
PECOS Enrollment IDI20070802000606
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 Katherine Ruiz-mellott reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Arbour Inc
32 mi
Psychiatry
49 ROBINWOOD AVE
Boston, MA 02130
  • Reassigned Medicare billing, Massachusetts enrollment
  • 62 clinicians in this Medicare group
NPI 1770766529 (617) 522-4400
First Psychiatric Planners, Inc
32 mi
Psychiatric Hospital
300 SOUTH ST
Brookline, MA 02467
  • Reassigned Medicare billing, Massachusetts enrollment
  • 34 clinicians in this Medicare group
NPI 1093714412 (617) 469-0300

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 5

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.
198 services30 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.
35 services11 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.
32 services18 patients
Psychiatric diagnostic evaluation with medical services 90792
A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.
20 services19 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01830 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
$177.36 typical visit price
range $58.86 – $177.36
Typical copayment $44.34 (range $14.71 – $44.34)
Most-billed visit code 99205
Established Patient
$73.22 typical visit price
range $19.11 – $144.84
Typical copayment $18.30 (range $4.77 – $36.21)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Katherine Ruiz-mellott's NPI number?

The NPI number for Katherine Ruiz-mellott is 1962516864. It was assigned to this individual provider in the NPPES registry on August 18, 2006.

Where is Katherine Ruiz-mellott located?

Katherine Ruiz-mellott practices at 76 Summer Street Whittier Pavilion, Haverhill, MA 01830. The listed phone number is (978) 556-6229.

What is Katherine Ruiz-mellott's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Katherine Ruiz-mellott enrolled in Medicare?

Yes. Katherine Ruiz-mellott 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 Katherine Ruiz-mellott's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Ruiz-mellott reassigns Medicare benefits to 2 organizations: Arbour Inc (Boston, MA) and First Psychiatric Planners, Inc (Brookline, MA). 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 Katherine Ruiz-mellott's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Katherine Ruiz-mellott was last updated on September 21, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.